1. Integer
Review

2. Integer Addition Rules
Integer Review
Integer Addition Rules
If the signs are the SAME
Add the numbers. The sign stays the same.
4 + 3 = 7 = -7
_ _ _ _
_ _ _
+ + +

3. Integer Addition Rules
Integer Review
Integer Addition Rules
If the signs are DIFFERENT Subtract the numbers. The “larger number” determines the sign of the answer.
_ _ _ _
_ _ _ _ _ = -4
Subtract the numbers
= 4
Answer -4
because you started with more negatives

4. Subtract Integers 3 - 2 = 1 + + + Integer Review 1) Put in 3
2) Take away 2 +
+ +
3) You are left with 1

5. Subtract Integers - - 3 - -2 = 5 + + + + + Integer Review 1) Put in 3
2) You can’t take away –2
so add 2 zeros
- -
+ +
3) Take away -2
4) You are left with +5

6. Subtract Integers _ _ _ Integer Review 1) Put in -3 -3 - -2 = -1
2) Take away -2
_ _ _
3) You are left with -1

7. Subtract Integers -3 - 2 = -5 _ _ _ _ _ Integer Review 1) Put in -3
_ _ _
2) You can’t take away 2
so add 2 zeros
_ _
+ +
3) Take away +2
4) You are left with -5

8. Keep the first number and add the opposite.
Integer Review
Subtract Integers
Keep the first number and add the opposite.
5 – 6
5 – 6
= -1
Is the same as
SUBTRACT = PLUS CHANGE!

9. Keep the first number and add the opposite.
Integer Review
Subtract Integers
Keep the first number and add the opposite.
= 6
4 – (– 2)
Is the same as
4 – (– 2)
SUBTRACT = PLUS CHANGE!

10. Keep the first number and add the opposite.
Integer Review
Subtract Integers
Keep the first number and add the opposite.
-3 – 1
Is the same as
= -4
-3 – ( 1)
SUBTRACT = PLUS CHANGE!

11. Multiply Integers Integer Review Add 2 groups of positive 3.
2(3) =
Add 2 groups of positive 3.
= 6
+ + +
+ + +
2(-3) =
Add 2 groups of negative 3.
_ _ _
_ _ _
= -6

12. Multiply Integers Integer Review Take away 2 groups of positive 3.
-2(3) =
= -6
_ _ _ _ _ _
Take away 2 groups of negative 3.
-2(-3) =
= 6
_ _ _ _ _ _

13. Integer Review
Divide Integers
When determining the sign, the rules of multiplying integers are the same for dividing integers.
If the signs are the same, the answer is positive.
- 64  - 8 = 8

14. Integer Review
Divide Integers
When determining the sign, the rules of multiplying integers are the same for dividing integers.
If the signs are different, the answer is negative.
- 8  4 = -2

15. Multiply & Divide Integers
Integer Review
Multiply & Divide Integers
When good things, happen to good people, that’s good!
+ • + = +
When bad things, happen to bad people, that’s good!
– • – = +
When good things, happen to bad people, that’s bad!
+ • – = –
When bad things, happen to good people, that’s bad!
– • + = –

16. Integer Review
Aren’t integers
interesting?
Take out your
Study Guide!

17. #16 TRY THESE! 7 15 3 -2 9 -19 23 Subtract Integers 1) -3 - - 10 =
Keep the first integer and add the opposite! 7
1) =
TRY THESE! 15
2) = 3
3) = -2
4) = 9
5) =
-19
6) = 23
7) =

18. # 17 Integer Review -3 + 5 = -3 - 5 = +3 + 5 = +3 - 5 = -8 -15 + 6 == = = -9 +2
-21 -2
+21 +8 +9 -5 +4 -9