Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 832 · 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. 1.45 × 30 =
2. 2.26 × 25 =
3. 3.65 × 36 =
4. 4.28 × 65 =
5. 5.55 × 22 =
6. 6.25 × 18 =
7. 7.125 × 32 =
8. 8.65 × 18 =
9. 9.10 × 15 =
10. 10.6 × 25 =
11. 11.38 × 15 =
12. 12.45 × 26 =
13. 13.30 × 75 =
14. 14.25 × 18 =
15. 15.8 × 65 =
16. 16.25 × 10 =
17. 17.75 × 20 =
18. 18.45 × 10 =
19. 19.125 × 30 =
20. 20.45 × 34 =
21. 21.22 × 125 =
22. 22.25 × 16 =
23. 23.55 × 40 =
24. 24.32 × 65 =
25. 25.14 × 125 =
26. 26.25 × 10 =
27. 27.55 × 14 =
28. 28.125 × 16 =
29. 29.65 × 26 =
30. 30.35 × 28 =
31. 31.15 × 14 =
32. 32.22 × 75 =
33. 33.12 × 25 =
34. 34.75 × 16 =
35. 35.55 × 24 =
36. 36.18 × 75 =
37. 37.75 × 22 =
38. 38.10 × 65 =
39. 39.38 × 35 =
40. 40.55 × 32 =

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