1. 1 Math Subtract Integers

2. 2 What Are You Learning? I CAN subtract integers.

3. 3 Why Do You Need To Know This? Subtracting integers is useful because it helps in solving real world problems.

4. 4 Subtract Integers To subtract an integer, add its opposite. LEAVE – CHANGE - OPPOSITE 4 – 9 = 4 + (-9) = -5 2 – 5 = 2 + (-5) = -3 2 – (-5) = 2 + 5 = 7

5. 5 a) 1 – 5 b) -2 – 1 c) -3 – 4 d) 0 – 5 Subtracting Integers – use a number line to double check your work!

6. 6 Subtracting Positive Integers a. 8 – 13 b. -10 – 7 c. 2 – 15

7. 7 -3 – 6 1. -3 2. 9 3. 3 4. -9

8. 8 Subtracting Negative Integers Remember – add the opposite! Change subtraction to addition, then change the sign of the second number. a. 1 – (-2) b. -10 – (-7) c. 4 – (-12) d. -15 – (-5)

9. 9 29 – (-24) 1. -53 2. 5 3. 53 4. -5

10. 10 -16 – (-8) 1. -24 2. -8 3. 24 4. 8

11. 11 Complete the following problems. a. -13 – 8 b. 12 – (-6) c. 21 – (-8)

12. 12 Complete the following problems. a. 32 – (-3) b. -40 – 66 c. 2 – 48 d. -7 – (-5) e. -24 – (-5) f. 19 – (-4) g. -33 – 11 h. 14 – 46 i. -200 – 50 – (-10)

13. 13 Complete the following problems. a. -6 – (-2) b. -7 - (-2) c. -4 – (-3) d. -8 – (-5) e. 4 – 8 f. -1 – 5 g. -2 – (-7) h. In January 1916 the temperature in Browning, Montana, fell 100 degrees overnight. The initial temperature was 44ºF. What was the final temperature?

14. Simplifying expressions with integers… 6 + (-5) – 3 15 – 12 – 8 1 – 8 + (-6) 4 – (-7) – 9 -2 – 5 – (-10) 14

15. 15 Class Work Complete first two columns on E-61 worksheet If you get done early…continue working on the other two columns.