1. Adding Integers The Positive and Negative of it All…

2. Get It! Got It! GREAT! What is an Integer? Integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5… and their opposite numbers less than zero: -1,-2,-3,-4,-5… Integer is 17 Opposite is -17 Integer is -8 Integer is 23 Opposite is 8 Opposite is -23

3. Integers on a Number Line Negative Integers are opposite whole numbers less than zero: -1,-2,-3,-4,-5… Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…

4. How to add positive & positive integers 35+ Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…

5. They are BOTH positive Therefore… add numbers And KEEP IT POSITIVE! 35+ 1 2 3 4 5 6 7 8

6. -35+ How to add negative & negative integers Negative Integers are opposite whole numbers less than zero: -1,-2,-3,-4,-5…

7. They are BOTH negative Therefore… add numbers And KEEP IT NEGATIVE! -3-5+ -2 -3 -4 -5 -6 -7 -8

8. How to add negative & positive integers -35+

9. Notice how positive and negatives are opposites going two different directions 1

10. Notice how positive and negative touch ends or points but don’t point in the same direction. 0 0

11. Positive 1/negative -1 cancel out to zero. 0 0 As per number line 1 Positive 1/positive 1 & negative -1/negative -1 follow the same direction and increase 2 or decrease -2. -1+ -1= -2 1+1= 2

12. -35+ Adding negative & positive integers

13. -35+ 1 5-3=2 5-3=2 5 is bigger and positive so answer must be positive. 2 000 Hint: Subtract both numbers and keep the sign of the bigger whole number.

14. Subtracting Integers Adding and subtracting integers is almost identical. We convert the subtraction symbol to addition and give the following number its opposite sign. 5 - 7 Change – to + and opposite of 7 is -7 5 + -7 -2 - 3 = -2 -2 + -3 = -5 Change – to + and opposite of 2 is -2 -2 – -8 -2 + 8 = 6 Change – to + and opposite of -8 is 8

15. Copyrighted and created by Susan Blakely