Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 681 · 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. 1.32 × 75 =
2. 2.15 × 32 =
3. 3.55 × 34 =
4. 4.38 × 45 =
5. 5.6 × 15 =
6. 6.14 × 15 =
7. 7.16 × 55 =
8. 8.8 × 25 =
9. 9.65 × 8 =
10. 10.14 × 25 =
11. 11.35 × 6 =
12. 12.45 × 8 =
13. 13.14 × 75 =
14. 14.34 × 35 =
15. 15.32 × 55 =
16. 16.25 × 34 =
17. 17.22 × 55 =
18. 18.25 × 26 =
19. 19.125 × 14 =
20. 20.10 × 35 =
21. 21.45 × 38 =
22. 22.65 × 22 =
23. 23.26 × 45 =
24. 24.32 × 125 =
25. 25.25 × 16 =
26. 26.8 × 65 =
27. 27.35 × 20 =
28. 28.15 × 24 =
29. 29.65 × 22 =
30. 30.16 × 65 =
31. 31.6 × 45 =
32. 32.30 × 35 =
33. 33.26 × 25 =
34. 34.10 × 55 =
35. 35.65 × 20 =
36. 36.55 × 32 =
37. 37.15 × 34 =
38. 38.25 × 10 =
39. 39.45 × 18 =
40. 40.22 × 15 =

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