This document contains math problems involving knowing doubles and halves of various numbers. It includes addition, subtraction, and missing number problems where the goal is to double or half quantities such as finding the number to add to 8 to make 16, subtracting from 60 to make 30, or the number to add to 11 to make 22.

1. Knowing Doubles & Halves
Number Facts

2. 6+6=

3. 8+8=

4. 12 + 12 =

5. 7+7=

6. 9+9=

7. 15 + 15 =

8. 25 + 25 =

9. 20 + 20 =

10. 50 + 50 =

11. 30 + 30 =

12. 11 + 11 =

13. 6 + __ = 12

14. 11 + __ = 22

15. 18 - 9 =

16. 60 - 30 =

17. 30 - 15 =

18. 24 - 12 =

19. 14 - 7 =

20. Double 8 =

21. Half of 50 =

22. Double 12 =

23. Half of 16 =

24. Double 15 =

25. Half of 10 =

26. Double 7 =

27. Half of 18 =

28. Double 11 =

29. Half of 100 =

30. Double 4 =

31. Half of 24 =

32. Double 6 =

33. Half of 30 =

34. __ + 8 = 16

35. 60 - ___ = 30

36. __ + 15 = 30

37. 14 - 7 =

38. __ + 11 = 22

39. 18 - 9 =

40. __ + 15 = 30

41. 24 - 12 =