1. We have learned many ways to remember our subtraction facts. Think for a moment about the strategies we have learned so far.

2. Think of facts that are examples of these subtraction strategies. -Halves, -From 10 One Less, Less -Near Doubles -Make ten and some more Record your ideas. We will chart all of our ideas in a few minutes. -Zero, -Ten

3. Let’s Chart Our Examples - From 10 One Less, Two Less -Halves -Near Doubles -Make ten and some more -Zero, -Ten

4. Our strategies work for almost every subtraction fact…

5. But 8 facts don’t quite fit…..

6. Actually it’s only 4 facts….. 6 - 35 - 37 - 57 - 4

7. Actually it’s only 4 facts (if you count the fact families….. 9 - 38 - 311 - 412 - 5 9 - 68 - 511 - 712 - 7 Why do you think that is?

8. Let’s look closely at these facts! 9 - 38 - 311 - 412 - 5 9 - 68 - 511 - 712 - 7

9. Think to yourself….. 9 - 38 - 311 - 412 - 5 9 - 68 - 511 - 712 - 7

10. What might some of these facts have in common? 9 - 38 - 311 - 412 - 5 9 - 68 - 511 - 712 - 7

11. With a partner, think of some helpful ways that you could remember these facts. 9 - 38 - 311 - 412 - 5 9 - 68 - 511 - 712 - 7

12. Remember!!! One strategy might not work for all of the facts. We will share our ideas as a class.

13. Record your ideas. Make sure that your words completely describe your strategy. It may be a good idea to illustrate your ideas.

14. If you finish early you can play a math folder game with your partner.

15. We will come together to share our ideas in 2 minutes.