1. Chapter 1.2 DO: We will add and subtract integers.

2. Activity: Think about it...
A football running back gains 8 yards then loses 10 yards. Is the end yardage greater than or less than the starting yardage?

3. Negatives and subtraction signs are the same thing
What’s the Big Idea?
Integers: positive and negative numbers, not including typical fractions or decimals
Negatives and subtraction signs are the same thing
Vid - Integers Club by Shmoop

4. Activity: Integer Counters
-3+2
Click Here Integer Counters
Click Here Integers Number Line

5. How to add and subtract integers: Simplify the signs
What’s the Big Idea?
How to add and subtract integers:
Simplify the signs
+ + simplifies to +
- - simplifies to +
+ - simplifies to -
Combine integers (use a t-chart)
Double-check that you have the correct positive or negative sign

6. Here’s how…
7+13
-8+(-5)
-20+(-5)
-3+7
3-12
-8-(-13)
5-(-4)

7. You try…
9+(-11)
-3+(-1)
0-(-11)
-5+12
-4-6
-7-(-8)
30-(-6)

8. Real Life Application
A shark is at -80 ft. It swims up and jumps out of the water to a height of 15 ft. Write and simplify an expression for the vertical distance the shark travels.

9. The figure shows a diver
Real Life Application
The figure shows a diver
diving from a platform. The diver reaches a depth of 4 meters. What is the change in elevation of the diver?

10. Check ✓
Explain how you add or subtract integers (aka combine integers).

11. Describe and correct the error! 7-(-12)=-5 -10+(-10)=0
Errors! Fix them!
Describe and correct the error!
7-(-12)=-5
-10+(-10)=0

12. Activity: Human Number Line
Click Here XP Math - Integers Addition
Click Here XP Math - Integers Subtraction

13. Become a Master at what you just learned.
Record and Practice Workbook (RP) Pg. 10 & 14 evens
XPmath.com - Score of 30 or higher with NO errors on “Integers Addition -9 to +9” & “Integers Subtraction -9 to +9” (photo)