Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 346 · 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 × 35 =
2. 2.45 × 6 =
3. 3.18 × 65 =
4. 4.45 × 22 =
5. 5.18 × 25 =
6. 6.12 × 15 =
7. 7.30 × 75 =
8. 8.40 × 15 =
9. 9.14 × 75 =
10. 10.24 × 45 =
11. 11.35 × 32 =
12. 12.55 × 8 =
13. 13.24 × 45 =
14. 14.38 × 35 =
15. 15.45 × 10 =
16. 16.55 × 28 =
17. 17.18 × 25 =
18. 18.22 × 65 =
19. 19.55 × 10 =
20. 20.125 × 22 =
21. 21.25 × 14 =
22. 22.8 × 55 =
23. 23.26 × 125 =
24. 24.65 × 22 =
25. 25.24 × 65 =
26. 26.55 × 40 =
27. 27.75 × 18 =
28. 28.35 × 40 =
29. 29.125 × 36 =
30. 30.45 × 38 =
31. 31.38 × 65 =
32. 32.10 × 55 =
33. 33.38 × 55 =
34. 34.26 × 15 =
35. 35.55 × 32 =
36. 36.45 × 38 =
37. 37.8 × 35 =
38. 38.14 × 55 =
39. 39.15 × 24 =
40. 40.35 × 12 =

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