Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 282 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.30 × 45 =
2. 2.25 × 28 =
3. 3.75 × 8 =
4. 4.55 × 10 =
5. 5.15 × 30 =
6. 6.55 × 6 =
7. 7.10 × 125 =
8. 8.14 × 45 =
9. 9.15 × 30 =
10. 10.32 × 75 =
11. 11.35 × 28 =
12. 12.28 × 75 =
13. 13.35 × 10 =
14. 14.35 × 18 =
15. 15.26 × 65 =
16. 16.25 × 10 =
17. 17.8 × 55 =
18. 18.36 × 65 =
19. 19.32 × 35 =
20. 20.35 × 34 =
21. 21.35 × 6 =
22. 22.15 × 14 =
23. 23.15 × 10 =
24. 24.26 × 15 =
25. 25.25 × 36 =
26. 26.38 × 25 =
27. 27.125 × 8 =
28. 28.15 × 8 =
29. 29.14 × 65 =
30. 30.35 × 32 =
31. 31.15 × 10 =
32. 32.45 × 16 =
33. 33.75 × 32 =
34. 34.25 × 14 =
35. 35.28 × 55 =
36. 36.25 × 38 =
37. 37.30 × 15 =
38. 38.10 × 45 =
39. 39.40 × 15 =
40. 40.75 × 22 =

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