1. 1.3 and 1.4
Watch Your Signs!

2. You will learn about: Adding 2 positive numbers together 4 + 3
Adding 2 negative numbers together
Double negative-what do you do?
Plus and a minus together-what do you do?

3. Part 1
Two
Positive
Numbers

4. Always gives you a Bigger
Two Positive Numbers
Always gives you a Bigger
Positive Number

5. = 17
Easy!

6. 1 2 3 + = - +

7. + Means Move to Right

8. Part 2
Two
Negative
Numbers

9. Add them together and keep the minus sign
-5 – 2 =? -7
Add them together and keep the minus sign

10. Add them together and keep the minus sign
-4 – 1 =? -5
Add them together and keep the minus sign

11. Add them together and keep the minus sign
-300 – 20 =?
-320
Add them together and keep the minus sign

12. - Means Move to Left

13. = -9 -9 -8 -7
The Dark Side

14. Negative: Move Toward The Dark Side

15. A Positive & A Negative Number
Part 3
A Positive &
A Negative
Number

16. Subtract the smaller from the larger
7 - 2 = ?
Subtract the smaller from the larger
The larger sign wins!
7 - 2 = 5

17. Subtract the smaller from the larger
2 – 7 = ?
Subtract the smaller from the larger
7 - 2 = 5
The larger sign (-7) wins!
2 - 7= -5

18. Subtract the smaller from the larger
3 – 15 = ?
Subtract the smaller from the larger
= 12
The larger sign wins!
= -12

19. Double Minus Alert!!!!

20. Two minus signs together:
Double minus (- -)
Equals a Plus ( + )

21. Double Minus Alert! =
6 + 3 = 9

22. Double Minus Alert! = = 1

23. Two signs together:
Minus and Plus (- +)
The minus always wins!

24. Minus kicks butt

25. = ?
6 – 2 = 4

26. = ?
-3 – 5 = -8

27. Got It?
= ?
- 3

28. Got It?
-30 – 4 = ?
-34

29. Got It?
= ? 6

30. Which are Integers?
4, 2.1, -5
4, -5

31. Trick Question
= ? 2

32. Got It?
Find |-3|
|-3| = 3

33. Got It?
= ? 11

34. Got It?
- 8 < or > 2 ?
- 8 < 2

35. Now, try some problems
on your own.