Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 651 · 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. 1.55 × 22 =
2. 2.12 × 45 =
3. 3.6 × 35 =
4. 4.55 × 32 =
5. 5.16 × 35 =
6. 6.8 × 45 =
7. 7.45 × 30 =
8. 8.35 × 38 =
9. 9.14 × 35 =
10. 10.15 × 16 =
11. 11.40 × 15 =
12. 12.10 × 125 =
13. 13.8 × 125 =
14. 14.75 × 30 =
15. 15.14 × 25 =
16. 16.35 × 8 =
17. 17.38 × 35 =
18. 18.55 × 22 =
19. 19.55 × 22 =
20. 20.125 × 32 =
21. 21.75 × 6 =
22. 22.45 × 40 =
23. 23.45 × 6 =
24. 24.25 × 18 =
25. 25.22 × 35 =
26. 26.15 × 32 =
27. 27.125 × 12 =
28. 28.15 × 8 =
29. 29.14 × 45 =
30. 30.16 × 45 =
31. 31.24 × 75 =
32. 32.15 × 22 =
33. 33.38 × 35 =
34. 34.28 × 75 =
35. 35.65 × 22 =
36. 36.75 × 20 =
37. 37.45 × 28 =
38. 38.18 × 45 =
39. 39.6 × 75 =
40. 40.75 × 22 =

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