1. Unit 3

2. » In Colorado the temperature was -2 °F in the morning. If the temperature dropped 7°F, what is the temperature now?

3. » The student will be able to: ˃Subtract integers. ˃Represent integer subtraction using models.

4. » Negative- RED » Positive- YELLOW » Zero Pair ˃A number and its opposite ˃Have a sum of zero ˃Turn and Talk + -

5. ZERO PAIRS 5 - 3 = +++ + +

6. ZERO PAIRS 5 - 3 =2 + +

7. ZERO PAIRS 3 - 5 = + ++ Bring in zero pairs

8. ZERO PAIRS 3 - 5 =-2

9. ZERO PAIRS 3 – (-5) = + ++ --- + ++ -- + + Bring in zero pairs

10. ZERO PAIRS 3 – (-5) = + ++ --- + ++ + + 8

11. A B

12. » How did the models help you subtract integers? » What rules or patterns did you notice about subtracting integers? » You can always draw your own counters if you do not have counters available

13. » RULE ˃Keep it, Change it, Change it ˃Then follow addition rules