1. Write down the integer that describes each situation.
September 7th: Day #1
DO NOW:
Write down the integer that describes each situation.
a. 5 degrees above 0
b. A $100 withdrawal from the bank
c. Loss of 15 yds
d. 5 feet below sea level

2. Before We Start My Name is Mr. O’Byrne This is Algebra
The first four minutes must be silent

3. Now Back to the Do Now a. 5 degrees above 0
b. A $100 withdrawal from the bank
c. Loss of 15 yds
d. 5 feet below sea level

4. Imagine
You are on an elevator at the ground floor and then hit the 15 button. At the 15th floor, you realize you made a mistake and go back down 12 floors. Where did you end up?
How do we represent going up? How do we represent going down? PQ: what can we use to represent the final location of the elevator? 15+(-12)=3

5. Ok So Today AIM: How do we add signed numbers
HW: Complete HW #1 worksheet
Crawl before you can walk

6. Homework Set up
Mild
Medium
Spicy

7. Homework Expectations
This will be completed and turned in tomorrow
It will be graded
See me if you have questions

8. Notes Simplify: 1) 4 + 3 = 2) (-2)+(-8) = 3) 5+(-6) = 3) -6 + 8 =
Talk about the elevator

9. From the Examples: Can we come up with a rule?
Rules for adding signed numbers:
If the numbers are the same, add the #’s and the keep the sign
If the numbers are different, subtract the numbers and keep the sign of the number with the greatest absolute value
Have absolute value discussion here

10. Try these on your own
1. 12+(-10) 2. (-4)+(-8) 3. (-13) (-12) 5. (-8)+(-7)+3+(-5) 6. 4+(-2)+7+(-10)
Emphasize two at a time

11. Now look at this 5 + (-3) = 5 – 3 =
NOTE: subtracting is the same as adding the opposite

12. Rules for subtracting signed numbers
1. Keep, change, opposite 2. Follow the rules for addition 3. Work two at a time

13. Notes
1) 2)

14. Independent Practice 8-(-2) 8-3 -8-(-4) -41- (-30) 10+(-7)-(-4)
-3+(-2)-(-5)+(-3)+11

15. Closing What was the AIM How do we add signed numbers?
How do we subtract signed numbers?

16. Exit Ticket