2. An Introduction to Cross Number Puzzles Across the Grades Created by: Lyn Channey, Kristy Garvin, Karen Kissel, Barbara Wennerberg, and Amy Zell

3. What is this? 31? 42? ???

4. What could you do with this? 31? 42? ???

5. When I point to you, click on the next number to sort these shapes. 1 2 7 8 3 5 6 4

6. 1 2 7 8 3 5 6 4

7. 1 2 7 8 3 5 6 4

8. 1 2 7 8 3 5 6 4

9. 1 2 7 8 3 5 6 4

10. 1 2 7 8 3 5 6 4

11. 1 2 7 8 3 5 6 4

12. 1 2 7 8 3 5 6 4

13. 1 2 3 4 7 8 5 6

14. How many circles do I have?

15. 4

16. How many rectangles do I have? 4

17. 4 4

18. How many blue shapes do I have? 4 4

19. 4 4 4

20. How many green shapes do I have? 4 4 4

21. 4 4 44

22. How many total shapes do I have? 4 4 44

23. 4 4 448

24. What number sentences could I make? 4 purples + 4 greens = 8 shapes4 circles + 4 rectangles = 8 shapes 4 4 448

25. This is a Kindergarten Cross Number Puzzle

26. In First Grade it might look like this: 314 426 7310

27. Flip it in Second Grade to show subtraction: 1037 624 413

28. Expand it to show two-digit addition. 10515 20222 30737

29. What number sentence does this represent? 10515 20222 30737

30. 15 + 22 = 37 10515 20222 30737

31. Now let’s try it with regrouping. 10515 20626 301141

32. What number sentence does this represent? 10515 20626 301141

33. 26 + 15 = 41 10515 20626 301141

34. Array Model of Multiplication 4 2

35. What does this represent? 4 2

36. 2 x 4 = 8 4 2

37. From here it moves to multi-digit multiplication. 105 20200100300 2201030 220110330 Array Model 15 15 X 20 105 20 2

38. Here is what the cross number puzzle would look like alone. 105 20200100300 2201030 220110330

39. What number sentence does this represent? 105 20200100300 2201030 220110330

40. 15 x 22 = 330 105 20200100300 2201030 220110330

41. 4 6 7310 In Conclusion… 10520200100300 2201030 2201103301051520626 301141 314426 7310

42. Any Questions?

43. Celebrate! You have just expanded your knowledge of Math!