Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 656 · 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. 2.32 × 35 =
3. 3.25 × 18 =
4. 4.125 × 18 =
5. 5.28 × 35 =
6. 6.125 × 12 =
7. 7.22 × 15 =
8. 8.55 × 14 =
9. 9.125 × 28 =
10. 10.75 × 32 =
11. 11.6 × 35 =
12. 12.35 × 10 =
13. 13.40 × 65 =
14. 14.25 × 12 =
15. 15.75 × 18 =
16. 16.45 × 36 =
17. 17.36 × 55 =
18. 18.65 × 28 =
19. 19.35 × 22 =
20. 20.55 × 36 =
21. 21.45 × 22 =
22. 22.65 × 38 =
23. 23.35 × 6 =
24. 24.65 × 16 =
25. 25.12 × 15 =
26. 26.45 × 26 =
27. 27.15 × 28 =
28. 28.15 × 22 =
29. 29.16 × 55 =
30. 30.25 × 18 =
31. 31.25 × 30 =
32. 32.36 × 35 =
33. 33.45 × 10 =
34. 34.28 × 15 =
35. 35.12 × 45 =
36. 36.65 × 38 =
37. 37.15 × 10 =
38. 38.15 × 10 =
39. 39.12 × 65 =
40. 40.65 × 8 =

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