1. Today you will need: Materials: A pencil Your math journal Ten frame practice sheet (optional) Materials: A pencil Your math journal Ten frame practice sheet (optional)

2. You have shown you can add two numbers to make ten.

3. With a partner write pairs of numbers that added together equal 10.

4. Do any groups have these pairs? 8 + 2 = 10 5 + 5 = 10 3 + 7 = 10 8 + 2 = 10 5 + 5 = 10 3 + 7 = 10

5. What pairs are missing? 8 and 2 = 10 5 and 5 = 10 3 and 7 = 10 8 and 2 = 10 5 and 5 = 10 3 and 7 = 10

6. The pairs of numbers that can be added together to make ten are: 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5

7. But we could also use facts that make ten to help us solve these problems. = 0 = 10

8. Let’s look at one of the problems. 34 + 6 =

9. What number would you put in the box to complete the number sentence. 34 + 6 =

10. Work with a partner to solve the problem. Make sure that you can tell how you solved the problem. 34 + 6 =

11. How did you solve the problem? 34 + 6 =

12. We could also think of this problem as: 34 + 6 = 30 + 4 + 6 =

13. We could also think of this problem as: 34 + 6 = 30 + 4 + 6 = 30 + 10 (because 6 + 4 = 10) =

14. Work with a partner to find the numbers that belong in the shapes. 27 + 3 = 54 + 6 = 71 + 9 = 5 + 35 = 42 + 8 = 10 + 60 = 33 + 7 = 4 + 76 =

15. You may want to use a ten frame sheet to make the addition sentence. If you do you will have to fill the ten frames to show the number. 27 + 3 = 54 + 6 = 71 + 9 = 5 + 35 = 42 + 8 = 10 + 60 = 33 + 7 = 4 + 76 =

16. We will come back together to share our findings. Be prepared to tell how you found your solutions. 27 + 3 = 54 + 6 = 71 + 9 = 5 + 35 = 42 + 8 = 10 + 60 = 33 + 7 = 4 + 76 =

17. Is it possible that we could use the make ten rule for other problems?

18. Let’s look at these two problems. 2 + 8 = 10 20 + 80 = 100 2 + 8 = 10 20 + 80 = 100

19. How are these problems similar? How are they different? 2 + 8 = 10 20 + 80 = 100 2 + 8 = 10 20 + 80 = 100

20. Could you use what you know about making ten to solve 20 + 80 = 100? 2 + 8 = 10 20 + 80 = 100 2 + 8 = 10 20 + 80 = 100

21. 2 and 8 make 10. What are the other pairs of numbers that make ten when added?

22. The pairs of numbers that can be added together to make ten are: 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5

23. If 2 + 8 = 10 is similar to 20 + 80 = 100 in some ways. 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5

24. If 2 + 8 = 10 is similar to 20 + 80 = 100 in some ways. Use the pairs below to find similar numbers that can be added to make a hundred. 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5

25. We will come back together in a few minutes to share our findings. 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5 0 and 10 - or - 10 and 0 1 and 9 - or - 9 and 1 2 and 8 - or - 8 and 2 3 and 7 - or - 7 and 3 4 and 6 - or - 6 and 4 5 and 5