Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 183 · 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. 1.6 × 65 =
2. 2.45 × 14 =
3. 3.18 × 25 =
4. 4.55 × 10 =
5. 5.55 × 38 =
6. 6.25 × 8 =
7. 7.10 × 75 =
8. 8.125 × 20 =
9. 9.65 × 38 =
10. 10.25 × 10 =
11. 11.65 × 28 =
12. 12.35 × 38 =
13. 13.16 × 55 =
14. 14.40 × 45 =
15. 15.32 × 45 =
16. 16.65 × 38 =
17. 17.26 × 45 =
18. 18.15 × 32 =
19. 19.25 × 26 =
20. 20.38 × 65 =
21. 21.125 × 40 =
22. 22.12 × 35 =
23. 23.14 × 55 =
24. 24.8 × 125 =
25. 25.20 × 65 =
26. 26.75 × 8 =
27. 27.32 × 55 =
28. 28.65 × 36 =
29. 29.38 × 35 =
30. 30.55 × 32 =
31. 31.18 × 55 =
32. 32.65 × 16 =
33. 33.75 × 14 =
34. 34.125 × 14 =
35. 35.26 × 65 =
36. 36.16 × 35 =
37. 37.14 × 65 =
38. 38.45 × 14 =
39. 39.45 × 8 =
40. 40.125 × 22 =

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