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NAME______________________________________________ Jacoby
Fall Semester 2013- 1 -
Chapter 7 Integers
Galileo lived in Italy in the 1500s He studied how to measure temperature Galileo found that a liquid would rise or fall in a glass tube depending on the temperature He liquid rose or dropped and the temperature as marked on the glass Sounds familiar Glass and alcohol or mercury thermometers are really number lines just like you use in math Theyrsquore marked by degrees of temperature Alcohol or mercury expands up into the positive numbers when heated and shrinks into the negative numbers when cooled Those positive and negative numbers are called integers In math integers can be a real hot topic
Goals for learningTo identify the absolute value of integersTo compare the values of negative and positiveTo add subtract multiply and divide integers
Watch Moviehttpwwwyoutubecomwatchv=2d5rWT6bHLUampfeature=channelampsafety_mode=trueamppersist_safety_mode=1
Lesson 1 The Real Number Line and Integers
I invented the thermometer I also said the sun was the
center of the universe
NAME______________________________________________ Jacoby
Fall Semester 2013- 2 -
In arithmetic you learned to add subtract multiply and divide whole numbers greater than zero In algebra you will also use whole numbers less than zeroWarm-UpWhat are some numbers less than zero Where do you see these numbers
You can use a number line to show the relation between positive and negative whole numbers also called integers
Vocab for Understanding Integer
Real Number
Negative Integer
Positive Integer
Every point on the number line corresponds to a specific real number The arrows at the ends of the number line show that the line continues
Numbers to the left of zero are negative integers They are read as lsquonegative onersquo lsquonegative tworsquohellip and so on
Zero is neither negative nor positive
Numbers to the right of the zero are positive integers They are read as lsquopositive onersquo positive tworsquo and so onhellipA negative number is always indicated by the______________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 3 -
A positive sign is always indicated by _____________________________ or
____________________________
The absolute value of an integer is the distance ________________________________
______________________________________________________________________
The integer can be either to the left or to the right of zero The symbol for absolute value is ___
Vocab Opposites
Example 1 |4| = 4 4 is 4 units from 0The absolute value of |4| is _______
|-4| = 4 -4 is ________ units from 0The absolute value of |-4| is _____
Every number other than 0 has an opposite number Opposites are the same distance from zero
Example 29 is the opposite of __________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 4 -
-9 is the opposite of _________________
9 is 9 units from 0
Both -9 and 9 are _________ units from 0
5 is the __________________________ of -5
-5 is the opposite of _________
5 is ____________ from 0
Both 5 and -5 ____________________________
Letrsquos Try Some Out
Use the number line below to find the values
1 You earn $6 from mowing the grass2 The wind chill is 12 below zero3 The Bears took a ten yard gain on the play 4 We realized we lost five dollars5 A mailbox post rises 4 feet above the ground it is set 2 feet into the ground
In ClassFind the absolute value1 |3| 2 |-12| 3 |-3|
NAME______________________________________________ Jacoby
Fall Semester 2013- 5 -
Name the opposite of each integer4 4 5 8 6 -7
Solve these problems using the number line
7 Which letters represent positive real numbers
8 Which letters represent negative real numbers
9 Which letter is the greatest distance from zero
10 Which letter represents the greatest absolute value
Give an integer that describes each situation11 A gain of 3 yards in football
12 A loss of 15 yards in football
13 A withdrawal of $40 from a bank account
14 A deposit of $100 in a bank account
15 A temperature of 13˚ F below zero
Watch the first couple minutes of chttpwwwyoutubecomwatchv=-AQFWV0AdLEampsafety_mode=trueamppersist_safety_mode=1
Lesson 2 Comparing Integers- Greater Than
To compare 2 numbers and determine which is greaterTo use the symbol gt to identify the larger of two integers
E D 0 A B C
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 2 -
In arithmetic you learned to add subtract multiply and divide whole numbers greater than zero In algebra you will also use whole numbers less than zeroWarm-UpWhat are some numbers less than zero Where do you see these numbers
You can use a number line to show the relation between positive and negative whole numbers also called integers
Vocab for Understanding Integer
Real Number
Negative Integer
Positive Integer
Every point on the number line corresponds to a specific real number The arrows at the ends of the number line show that the line continues
Numbers to the left of zero are negative integers They are read as lsquonegative onersquo lsquonegative tworsquohellip and so on
Zero is neither negative nor positive
Numbers to the right of the zero are positive integers They are read as lsquopositive onersquo positive tworsquo and so onhellipA negative number is always indicated by the______________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 3 -
A positive sign is always indicated by _____________________________ or
____________________________
The absolute value of an integer is the distance ________________________________
______________________________________________________________________
The integer can be either to the left or to the right of zero The symbol for absolute value is ___
Vocab Opposites
Example 1 |4| = 4 4 is 4 units from 0The absolute value of |4| is _______
|-4| = 4 -4 is ________ units from 0The absolute value of |-4| is _____
Every number other than 0 has an opposite number Opposites are the same distance from zero
Example 29 is the opposite of __________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 4 -
-9 is the opposite of _________________
9 is 9 units from 0
Both -9 and 9 are _________ units from 0
5 is the __________________________ of -5
-5 is the opposite of _________
5 is ____________ from 0
Both 5 and -5 ____________________________
Letrsquos Try Some Out
Use the number line below to find the values
1 You earn $6 from mowing the grass2 The wind chill is 12 below zero3 The Bears took a ten yard gain on the play 4 We realized we lost five dollars5 A mailbox post rises 4 feet above the ground it is set 2 feet into the ground
In ClassFind the absolute value1 |3| 2 |-12| 3 |-3|
NAME______________________________________________ Jacoby
Fall Semester 2013- 5 -
Name the opposite of each integer4 4 5 8 6 -7
Solve these problems using the number line
7 Which letters represent positive real numbers
8 Which letters represent negative real numbers
9 Which letter is the greatest distance from zero
10 Which letter represents the greatest absolute value
Give an integer that describes each situation11 A gain of 3 yards in football
12 A loss of 15 yards in football
13 A withdrawal of $40 from a bank account
14 A deposit of $100 in a bank account
15 A temperature of 13˚ F below zero
Watch the first couple minutes of chttpwwwyoutubecomwatchv=-AQFWV0AdLEampsafety_mode=trueamppersist_safety_mode=1
Lesson 2 Comparing Integers- Greater Than
To compare 2 numbers and determine which is greaterTo use the symbol gt to identify the larger of two integers
E D 0 A B C
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 3 -
A positive sign is always indicated by _____________________________ or
____________________________
The absolute value of an integer is the distance ________________________________
______________________________________________________________________
The integer can be either to the left or to the right of zero The symbol for absolute value is ___
Vocab Opposites
Example 1 |4| = 4 4 is 4 units from 0The absolute value of |4| is _______
|-4| = 4 -4 is ________ units from 0The absolute value of |-4| is _____
Every number other than 0 has an opposite number Opposites are the same distance from zero
Example 29 is the opposite of __________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 4 -
-9 is the opposite of _________________
9 is 9 units from 0
Both -9 and 9 are _________ units from 0
5 is the __________________________ of -5
-5 is the opposite of _________
5 is ____________ from 0
Both 5 and -5 ____________________________
Letrsquos Try Some Out
Use the number line below to find the values
1 You earn $6 from mowing the grass2 The wind chill is 12 below zero3 The Bears took a ten yard gain on the play 4 We realized we lost five dollars5 A mailbox post rises 4 feet above the ground it is set 2 feet into the ground
In ClassFind the absolute value1 |3| 2 |-12| 3 |-3|
NAME______________________________________________ Jacoby
Fall Semester 2013- 5 -
Name the opposite of each integer4 4 5 8 6 -7
Solve these problems using the number line
7 Which letters represent positive real numbers
8 Which letters represent negative real numbers
9 Which letter is the greatest distance from zero
10 Which letter represents the greatest absolute value
Give an integer that describes each situation11 A gain of 3 yards in football
12 A loss of 15 yards in football
13 A withdrawal of $40 from a bank account
14 A deposit of $100 in a bank account
15 A temperature of 13˚ F below zero
Watch the first couple minutes of chttpwwwyoutubecomwatchv=-AQFWV0AdLEampsafety_mode=trueamppersist_safety_mode=1
Lesson 2 Comparing Integers- Greater Than
To compare 2 numbers and determine which is greaterTo use the symbol gt to identify the larger of two integers
E D 0 A B C
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 4 -
-9 is the opposite of _________________
9 is 9 units from 0
Both -9 and 9 are _________ units from 0
5 is the __________________________ of -5
-5 is the opposite of _________
5 is ____________ from 0
Both 5 and -5 ____________________________
Letrsquos Try Some Out
Use the number line below to find the values
1 You earn $6 from mowing the grass2 The wind chill is 12 below zero3 The Bears took a ten yard gain on the play 4 We realized we lost five dollars5 A mailbox post rises 4 feet above the ground it is set 2 feet into the ground
In ClassFind the absolute value1 |3| 2 |-12| 3 |-3|
NAME______________________________________________ Jacoby
Fall Semester 2013- 5 -
Name the opposite of each integer4 4 5 8 6 -7
Solve these problems using the number line
7 Which letters represent positive real numbers
8 Which letters represent negative real numbers
9 Which letter is the greatest distance from zero
10 Which letter represents the greatest absolute value
Give an integer that describes each situation11 A gain of 3 yards in football
12 A loss of 15 yards in football
13 A withdrawal of $40 from a bank account
14 A deposit of $100 in a bank account
15 A temperature of 13˚ F below zero
Watch the first couple minutes of chttpwwwyoutubecomwatchv=-AQFWV0AdLEampsafety_mode=trueamppersist_safety_mode=1
Lesson 2 Comparing Integers- Greater Than
To compare 2 numbers and determine which is greaterTo use the symbol gt to identify the larger of two integers
E D 0 A B C
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 5 -
Name the opposite of each integer4 4 5 8 6 -7
Solve these problems using the number line
7 Which letters represent positive real numbers
8 Which letters represent negative real numbers
9 Which letter is the greatest distance from zero
10 Which letter represents the greatest absolute value
Give an integer that describes each situation11 A gain of 3 yards in football
12 A loss of 15 yards in football
13 A withdrawal of $40 from a bank account
14 A deposit of $100 in a bank account
15 A temperature of 13˚ F below zero
Watch the first couple minutes of chttpwwwyoutubecomwatchv=-AQFWV0AdLEampsafety_mode=trueamppersist_safety_mode=1
Lesson 2 Comparing Integers- Greater Than
To compare 2 numbers and determine which is greaterTo use the symbol gt to identify the larger of two integers
E D 0 A B C
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 6 -
Warm-Up Here is a list of basketball scores 102 5442 5612 5984 76
LessonIntegers can be arranged in an increasing or decreasing order Consecutive integers are integers arranged from least or greatest or greatest to least without any missing integers The integers on a number line are consecutive integers
You can use a number line to compare two integers On a number line the greater of two numbers is the number to the right
Example 1 Compare 2 and -3
_________ is to the __________ of ______________ on the number line
______ is greater than -3
Example 2 Compare -1 and -5 Remember The symbol gt read ldquois greater thanrdquo is used to show that one integer is greater than another
2 gt -3 -1 gt -5
Example 3 Compare |-5| and |-3|
Which ones are the winning scores How do you see scores posted
less greater
Common ErrorSome students may have a hard time perceiving -1 as greater than -5 Visualize on the number line and recall that lsquofarther right is greaterrsquo
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 7 -
-5 is _________________________ so |-5| = 5
-3 is 3 units from zero so _______________________
________ is farther to the right than ____ so | | gt | -3 |
Letrsquos try it out
Compare each pair Use gt or =
1 5 2 2 |-2| 2
3 |8| -3 4 |-8| |-3|
All Class Each student will get a note card with an integer Try to arrange yourselves from least on the left and the greatest on the right
Lesson 3 Less ThanObjectiveTo compare two numbers and decide which is smaller To use the symbol lt to identify the smaller of two numbers
Warm-Up What does this mean
gtTry writing a true number sentence using that sign
What do you think this means lt
You can use a number line to compare to integers On a number line the lesser of two numbers is the number farthest to the left
less
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 8 -
Example 1 Compare -3 and 1
Example 2 Compare -5 and -3
Remember the symbol lsquoltrsquo means less than It is used to show that one integer is less than another
Example 3 Compare -5 and |-3|
In Class Compare each pair Use lt or =
1 2 5 2 -2 1
3 12 |-12| 4 |-1| 10
5 A student lists these five numbers and says that they are consecutive integers
-2 -1 0 1 2 3
Is she right
6 The temperature was 0˚ F on Saturday and -11 ˚F today Which temperature is higher Explain
All Class Get into pairs Try to come up with a word problem comparing two different temperatures from the data given below You have 3 minutes
January TemperaturesMonday 5˚ F
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 9 -
Tuesday 2˚ FWednesday -3˚ FThursday 0˚ F
Homework
Lesson 4 Even and Odd Integers
Objectives To identify integers as odd or evenTo add subtract and multiply integersTo notes the pattern of answers obtained by operations on odd and even numbers
Warm-Up 1 Count by 2s up to 20
Even Odd
LessonZero is an _______________________________ because it is situated between -1
and 1 on the number line
Also any number ending with a zero is a ______________ of 2
Integers that have a factor of 2 without leaving a remainder are even integers -6 -4 -2 0 +2 +4 and +6 are examples of even integers
Integers that do not have a factor of 2 are odd integers -5 -3 -1 +1 +3 and +5 are examples of odd integers
You can tell whether a number is even or odd by ______________________________________
If the digit in the ones position is odd ______________________________________________
If the digit in the ones position is even ______________________________________________
Example 1 Even or odd
2478563
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 10 -
3556430
Consecutive even integers are
Consecutive odd integers are
When you add or subtract integers you can predict whether the sum or difference will be odd or even
Adding Integers Subtracting IntegersEven + even = even Even ndash even = evenEven + odd = odd Even ndash odd = oddOdd + odd = even Odd ndash odd = even
You can also predict whether or not a product will be even
Multiplying IntegersEven even = evenEven odd = evenOdd odd = odd
Example 2 Tell whether the following numbers are odd or evena 24004 b 35793 c 12457753456899
Tell whether the answer will be even or odd without solving the problem
d 432 + 444 e 669 ndash 571 f 24 x 36 g 22 x 43
Tell which operation will give the desired even or off integer Then solve the problem There may be more than one correct answer
h 4 5 = (even) i 9 3 = (even)
j 6 3 = (odd)
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 11 -
Make a table for divisionSee if there are rules for division
Homework
Lesson 5 Adding Positive IntegersObjectives To visualize sums of integers on the number lineTo add positive integers to positive or to negative integers
Warm- Up
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 12 -
The temperature of the fluid is -4 degrees Mark this on a number line
If you add heat to the fluid and raise it by 3 degrees What is the new temperature of the fluid
You can use the number line to help you find and understand how to add positive integers to other positive and negative integers
Example 1 Find the sum of 3 + 5Begin at 3Move to the right 5 units3 + 5 =
Rule Adding a positive to a positive gives a result farther to the right on the number line
Example 2 Find the sum of -3 + 5Begin at -3Then move ______________________________
-3 + ________ = ___________
Rule Adding a positive to a negative gives a result farther to the right on the number line
ExamplesFind each sum
1 -12 + 4 2 -7 + 7 3 -6 + 8
0-1-2-3-4-5-6-7-8-
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 13 -
Calculator practice 1 652 + 978 2 -57 + 784 3 -441 + 239
Further Understanding
Lesson 6 Adding Negative Numbers
Objectives To move left along the number line to represent the sum of a positive or negative integer and a negative integerTo add negative integers to positive or negative integers
Warm-UpldquoWhen could you add two numbers and get a sum with a value smaller than wither addend ldquo
LessonYou can use the number line to help you find and understand how to add negative integers to other positive or negative integers
RULE Adding a negative to a positive gives a result farther to the left on the number line
- +Example 1 Find the sum of 3 + (-5) Begin at 3 Then move to the left 5 units
Here is a trickThink of -7 + 7 as 7 ndash 7
-6 + 8 as 8 ndash 6
You can do this do to the commutative property
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 14 -
Example 2 Find the sum of -3 + (-5)
Begin at ________________________
Then move _____________________ 5 units
1 -2 + (-7)which number is the biggest
What will our sign be for our answer
2 -4 + (-5)
3 2 + (-3)
4 5 + (-2)
Letrsquos Step It Up 1 Find the number that is the biggest The sign that is with the biggest number will be your sign for your answer
2 If the numbers are both negative treat it as an addition problem and carry down the negative sign
3 If the numbers are of opposite sign with the bigger number being negative treat the problem like a subtraction problem Take the smaller number away from the larger number But carry down the negative sign
4 If the numbers are of opposite signs with the bigger number being positive treat the problem like a subtraction problem Take the smaller number away from the larger number Your answer will be positive
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 15 -
Try some out
1 -2 + (-5) 2 12 + (-32) 3 28 + (-32)
4 -6 + (-6) 5 6 + (-6) 6 6 + 6
Try these harder ones with a calculator
1 -359 + (-243) 2 233 + (-873) 3 -649 + (-573)
Word Problems1 An airplane flying at 25000 feet climbs an additional 2000 feet What is the final altitude of the airplane
2 At midnight the temperature was 29˚C During the day the temperature fell 4 degrees What is the final temperature
Homework Lesson 7 Subtracting Positive amp Negative Integers
ObjectivesTo model subtraction of positive and negative integers on the number lineTo convert subtraction expressions to addition expressionTo subtract positive and negative integers from positive and negative integers
Warm-Up white board +++ --- 3 5 2
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 16 -
LessonA number line can be used to show that subtracting a number gives the same result as adding the opposite of the number
Example 1Find the difference of 3 ndash (+5)Begin at 3Then move to the ___________ 3 units
RULE _______________________________________________________________________
Example 2Find the difference of -3 ndash (-5)Begin at -3Then move to the right _____ units
RULE _____________________________________________________________________
___________________________________________________________________________Example 3Find the difference of 3 ndash (-5)Begin at 3Then move to the ___________ 5 units
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 17 -
RULE ___________________________________________________________________
Example 4 Find the difference of -3 ndash (+5)Begin at __________
Then move to the left __________________
RULE ___________________________________________________________________
Look again at addition of positive and negative integers Compare the results with subtraction of integers
Subtraction Addition 3 ndash (+5) = -2 is the same as is the same as -3 + 5 = 2 3 ndash (-5) = 8 is the same as is the same as -3 + (-5) = -8 Subtraction is the same asRULE____________________________________________________Try some out1 4 ndash (+5) 2 -6-4 3 8 ndash 4
4 -2 ndash (+4) 5 10 ndash (+7) 8 -9 ndash (-11)
Mental Math In-Class Work 10-9 10-8 10- (-1) 10- (-2)hellip
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 18 -
Word Problems
9 The highest point on Earth is Mt Everest 29028 feet above sea level The shore of the Dead Sea is the lowest place on Earthrsquos surface at 1312 feel below sea level What I the vertical distance from the shore of the Dead Sea to the top of Mount Everest
10 What is the difference between Alaskarsquos record low temperature of -80˚F and Utahrsquos record low of -69˚F
Homework
Lesson 8 amp 9 Multiplying by Positive and Negative NumbersObjectives To identify the sign of a product as positive or negativeTo multiply positive and negative integers
Example 1 Find the product of (+4) and (+3)
Rule_______________________________________________________________________
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 19 -
Example 2Find the product of (-4) (3)
Rule ______________________________________________________________________
Try some out
1 (4)(5) 2 (4)(-5) 3 (-6)(3) 4 (6)(3)
Example 3 Find the product of (-4)(-3)
Rule_________________________________________________________________________
To be successful in Algebra you will need to memorize these rules
Try some more out look at your rules for help
5 (-2)(6) 6 (-10)(-11) 7 (23)(30) 8 (-2)(-6)
Word Problems
Every year for the past five years the forest preserve has lost 16 trees due to disease or weather How many trees have been lost in the past five years
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 20 -
At a local movie theater senior citizens receive a $200 discount How much less will a senior pay to attend 15 movies in a year
Homework
Lesson 10 Dividing Positive and Negative Integers
Objectives To model division of negative and positive integers on the number lineTo divide negative and positive integers and identify the sign of a quotient
Warm-Up(-8)(4) (4)(3) (-2)(-3)
Because multiplication and division are opposite operations the rules for multiplying positive and negative integers are similar to those of division
Complete the table below
Multiplication Division(3)(4) =Rule
and 12 divide 4 =Rule
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 21 -
(3)(-4) = Rule
and 12 divide (-4) =Rule
(-3)(4)=Rule
and (-12) divide (4) =Rule
(-3)(-4)Rule
and (-12) divide (-4) =Rule
A general statement can be made that covers all the multiplication and division rules
Try some out Use the rules to help you out
1 4 divide 2 2 32 divide (-4) 3 (-24) divide (4)
4 (30) divide (-5) 5 (-20) divide (-4) 6 (-28) divide (-4)
7 The theater complex has 1440 seats in six theaters All theaters have the same number of seats How many seats does each theater have
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework
NAME______________________________________________ Jacoby
Fall Semester 2013- 22 -
8 A submarine moving underwater at -390meters It dives to that level in 13 minutes How many meters does it dive per minute
Homework