Math 9 Integers addition and subtraction

A)/B)  

C)

D)

E)

F)

G)

Questions:

1. a) 5 + 11= 16
2. b) -5 + (-11)= (-16)
3. c) -5 – (-11)= 6
4. d) 5 – 11= (-6)
5. e) 5 – (-11)= 16
6. f) -5 – 11= (-16)
7. g) -5 + 11= 6

#1 and #5 are equivalent because #5 is a subtraction which means that it will be the opposite. So it will be an addition. #2 and #6 are also equivalent because they are opposite. #2 and #7 are equivalent because the minus symbol and the 11 in #2 become positive because a subtraction becomes the opposite when you want the answer.

While doing the activity I learned multiple was to add and subtract integers and different strategies.

I think it’s important or students to learn integers because they can learn ways to work with negative numbers and algebra will be easier if students know integers really well.