1. Adding Integers
A.08

2. At 9 PM, the temperature was 5ᵒ below zero.
By 1 AM, it dropped a whole 15ᵒ!
By 10 AM, it had only risen 10ᵒ.
I need it to be above freezing by 2 PM or I have to cancel my party!

3. My friend, the Number Line

4. Notes – Adding Integers
Integers = positive or negative whole numbers
For adding:
If working together (both positive or both negative):
Add and keep the sign
If working against each other (one positive and one negative):
Subtract and take the sign of the bigger number
For subtracting:
Change to addition and follow the above rules

5. Ex) 14
- 5 9 9
-17 – 24
-17 + (-24)
-41 24
+17 _ 41

6. 1) -5 – 18 2) 8 – 14 3) 3 – 12 4) -5 – (-3) 5) -18 + 41 6) 9 +(-4)
Practice
1) -5 – 18 2) 8 – 14 3) 3 – 12 4) -5 – (-3) 5) ) 9 +(-4) -6
-23 -2 -9 5 23