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Jordin Billinghurst and Matt Phelps
Introduction to Mathematics
Let’s Check Out The Subjects
Table of Contents• Addition• Subtraction• Multiplication• Division• Geometry• Practice Problems
ADDITION!
+ Combine two numbers together and find out how many we have in
all.
Check Out This Cool Video!
TABLE OF CONTENTSLet’s See a Problem….
Let’s see a problem….
Four ApplesPLUS
Three ApplesEQUALS . . .
How Many Apples Will We Have In All?
TABLE OF CONTENTS
...7 APPLES
4 + 3 = 7Great Job! TABLE OF CONTENTS
SUBTRACTION!
- Take away a number from a larger number to see how much is left
-Addition is the act of putting things together-Subtraction is the act of taking things away
Cookie Monster
TABLE OF CONTENTS Let’s See a Problem….
Let’s see a Subtraction problem….
Six Pumpkins
MINUS
Four Pumpkins
Equals...
TABLE OF CONTENTSThe Answer is…….
...2 Pumpkins
6 – 4 = 2
Keep up the good work!!
TABLE OF CONTENTS
MULTIPLICATION!
-Combine numbers to get answers by working with groups of items rather than individual items
-In addition you can add 2 + 2 + 2 + 2 and get 8.-In multiplication you can multiply 2 four times
and also get 8. So that means 2 x 4 = 8.
Let’s Try a Problem!TABLE OF CONTENTS
If we have 5 people, and 2 shoes per person, how many
shoes will we have in all?
X
2 shoesTimes
5 peopleEquals
How Many Shoes Will We Have?TABLE OF CONTENTS
… 10 SHOES
5 x 2 = 10
TABLE OF CONTENTS Nice Work!
DIVISION!
-Try and figure out how many times a number will going into another
number.
TABLE OF CONTENTS
Let’s Try a Problem……
Let’s see a problem…..If we have 10 Dollars and 5 People, how many dollars will each person get? Take the bigger number and divide by the smaller number.
÷10 dollars Divided by 5 people Equals….
TABLE OF CONTENTS The Answer Is…….
…2 Dollars!Each person will get 2 Dollars
10 ÷ 5 = 2Wow, you’re good!
TABLE OF CONTENTS
GEOMETRY!In Geometry we deal with shapes such as Squares, Triangles and Circles.
By using our math skills we figure out the size, length, and angles of the different shapes!
TABLE OF CONTENTS Let’s Try a Problem…..
Let’s try a Geometry problem...What is the perimeter of this rectangle with the given lengths?
4 cm
2 cm
How would you set up this problem?Let’s see the answer...TABLE OF CONTENTS
2 cm
4 cm
4 cm
2 cm
2 cm + 4 cm + 2 cm + 4 cm = 12 cm
The Perimeter of this rectangle is 12 cm!
Nice Job!TABLE OF CONTENTS
Practice Problems
• Now lets practice what we have learned…
5 2 = 7 9 3 = 6
13 1 = 14 5 4 = 1
TABLE OF CONTENTS
Practice Problems
• And the answers are…
5 + 2 = 7 9 - 3 = 6
13 + 1 = 14 5 - 4 = 1
TABLE OF CONTENTS
Lets practice some multiplication and division problems.
3 4 = 12
8 2 = 4
20 10 = 2
6 3 = 18
TABLE OF CONTENTS
And now for the ANSWERS…
3× 4 = 12
8 ÷ 2 = 4
20 ÷ 10 = 2
6 × 3 = 18
TABLE OF CONTENTS
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