1. Warm up
(-3) =
– (-8) = =
– (-4)=

2. Adding and Subtracting Integers

3. Adding Integers
If the signs are the same, ADD the numbers and give the sum the same sign.
Example:
= 25
= -25

4. Adding Integers
When adding a negative number with a positive you have three options!!!!
Counters
Number Line
Score board

5. NUMBER LINE
Answer +3

6. Score Board -4 + 7 = Who won?? By how much?? Answer is
Positive Team (+)
Negative Team (-)
Who won??
By how much??
Answer is

7. Three Steps (KCC) 1. Keep 2. Change 3. Change (Opposite)
SUBTRACTION
Three Steps (KCC)
1. Keep
2. Change
3. Change (Opposite)

8. Subtraction (3-Steps) -3 – (-4) -3 + (+4)
1. KEEP THE FIRST NUMBER THE SAME
2. CHANGE the (-) to a (+)
3. CHANGE the second number to the (opposite)
-3 – (-4)
-3 + (+4)

9. Practice
1) – 11 =
4) -16 – (-14) =
2) (-40) =
5) 13 – 35 =
3) – 9 =
6) =

10. The Houston Texans lost 7 yards on one play and then gained 12 yards on the next play. What was the total number of yards gained or lost?
On Friday Rosa borrowed $10 from her sister. The next day she paid back $5. Then on Monday she borrowed $4 more. How much does Rosa owe?

11. 3) Roger owes his mom $5. He borrows another $6 from her
3) Roger owes his mom $5. He borrows another $6 from her. How much does he owe her now? 4) A roller coaster begins at 90 feet above ground level. Then it descends 105 feet. Find the height of the coaster after the first descent.

12. Exit Ticket -5 + 15 = 8 – (-3) = -2 – 6 =
Answer the following questions.
SHOW YOUR WORK!!! (using score board or number line) =
8 – (-3) =
-2 – 6 =