Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 9 · 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. 1.12 × 65 =
2. 2.18 × 45 =
3. 3.25 × 30 =
4. 4.45 × 20 =
5. 5.22 × 25 =
6. 6.24 × 45 =
7. 7.24 × 35 =
8. 8.6 × 125 =
9. 9.65 × 6 =
10. 10.14 × 55 =
11. 11.35 × 22 =
12. 12.55 × 8 =
13. 13.45 × 16 =
14. 14.125 × 22 =
15. 15.14 × 55 =
16. 16.8 × 65 =
17. 17.24 × 15 =
18. 18.65 × 30 =
19. 19.14 × 55 =
20. 20.8 × 55 =
21. 21.45 × 12 =
22. 22.15 × 40 =
23. 23.22 × 55 =
24. 24.28 × 45 =
25. 25.55 × 36 =
26. 26.125 × 22 =
27. 27.6 × 25 =
28. 28.24 × 35 =
29. 29.24 × 65 =
30. 30.14 × 35 =
31. 31.45 × 32 =
32. 32.25 × 26 =
33. 33.65 × 6 =
34. 34.75 × 32 =
35. 35.8 × 45 =
36. 36.12 × 45 =
37. 37.28 × 125 =
38. 38.45 × 16 =
39. 39.40 × 75 =
40. 40.6 × 125 =

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