Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 757 · 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. 1.25 × 32 =
2. 2.6 × 65 =
3. 3.45 × 22 =
4. 4.25 × 36 =
5. 5.20 × 45 =
6. 6.45 × 38 =
7. 7.38 × 15 =
8. 8.75 × 20 =
9. 9.65 × 12 =
10. 10.25 × 12 =
11. 11.35 × 6 =
12. 12.65 × 36 =
13. 13.36 × 125 =
14. 14.35 × 14 =
15. 15.26 × 65 =
16. 16.125 × 12 =
17. 17.55 × 36 =
18. 18.45 × 6 =
19. 19.26 × 65 =
20. 20.15 × 6 =
21. 21.65 × 32 =
22. 22.38 × 45 =
23. 23.30 × 75 =
24. 24.32 × 65 =
25. 25.125 × 32 =
26. 26.65 × 18 =
27. 27.55 × 16 =
28. 28.20 × 75 =
29. 29.15 × 40 =
30. 30.12 × 125 =
31. 31.32 × 35 =
32. 32.18 × 125 =
33. 33.36 × 25 =
34. 34.15 × 28 =
35. 35.40 × 15 =
36. 36.55 × 12 =
37. 37.18 × 35 =
38. 38.25 × 24 =
39. 39.38 × 35 =
40. 40.35 × 18 =

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