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Integer Rules Review. Warm-Up: 9/9. 1. Solve: -42 + 17 2. If yesterday it was -4° and today it is 23°, how much warmer is it today than yesterday? . Today’s Agenda. Warm-Up Adding and Subtracting Integers Review Multiplying and Dividing Integer Rules Integer Foldable Wrap-Up - PowerPoint PPT Presentation
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+
Integer Rules Review
+Warm-Up: 9/91. Solve: -42 + 17
2. If yesterday it was -4° and today it is 23°, how much warmer is it today than yesterday?
+Today’s AgendaWarm-UpAdding and Subtracting Integers Review
Multiplying and Dividing Integer Rules
Integer FoldableWrap-UpHomework
+Adding Integers ReviewHow do we add integers with the same sign?Add and keep the sign
How do we add integers with different signs?Subtract and keep the sign of the larger.
+Let’s Sing a Song!Addition Rule: Sung to the tune of “Row, row, row, your boat”
Same signs add and keep,
different signs subtract,keep the sign of the
higher number,then it will be exact!
+Let’s Try Some……-32 + (-12)30 + (-25)-19 + 16(-18) + (-15)
-445-3-33
+Integers and MoneyRemember….. A negative number is like losing money and a positive number is like winning money
+Integers and MoneyFor example, -16 + 8 is the same as…. A loss of $16 A gain of $8**This means you are still down $8!**
+Subtracting Integers ReviewHow do we change a subtraction problem into an addition problem?Same Change Opposite(-4) – (-5) = (-4) + 55 – 10 = 5 + (-10)
+Integers and MoneyThis is also like winning and losing money.
5 – 10 A win of $5 and a loss of $10This means you are in the hole $5, or -5
+Let’s Try Some(-23) – 1018 – (-5)(-15) – (-8)20 – 30
-3323-7-10
+
Multiplication and Division of Integers
+Here’s a way I can Remember!To remember whether your answer will be positive or negative when MULTIPLYING or DIVIDING, we’ll use:
Mr. Multiplivision
When multiplyingIntegers, cover the Two signs you are using
Ex.: 5 (-3)What sign is leftuncovered?Negative, - That is the sign of The answer= -15
Choral Response
Practice …
(-10)(3) = 21 -5 = -13 -6 =
Division
Good News: It’s not any different!
Ex.: -48 (-4)= + 12
+Reminder:
Equal means it works both ways!
+
SOLVE:(4)(-7) (-2)
+ (4)(-7) (-2)
First, (4)(-7) = - 28
Finish it! (-28)(-2)
Answer: 14
+Integer Foldable
http://everybodyisageniusblog.blogspot.com/2012/07/integer-foldable.html
+Put your thinking cap on!A, B, C, D, and E correspond to points on a thermometer. Use these clues to plot the points:*B and D are negative
*D is warmer than C *B is warmer than C *E and D are the same distance from zero *E is colder than A Compose your own thermometer problem and include your answer.
+Homework
Handout: Problems 1-10