Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 33 · 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. 1.28 × 45 =
2. 2.125 × 20 =
3. 3.75 × 16 =
4. 4.10 × 35 =
5. 5.38 × 65 =
6. 6.16 × 125 =
7. 7.65 × 34 =
8. 8.34 × 45 =
9. 9.22 × 55 =
10. 10.35 × 14 =
11. 11.55 × 24 =
12. 12.16 × 125 =
13. 13.55 × 12 =
14. 14.18 × 45 =
15. 15.55 × 20 =
16. 16.18 × 55 =
17. 17.65 × 22 =
18. 18.65 × 8 =
19. 19.20 × 25 =
20. 20.35 × 12 =
21. 21.45 × 22 =
22. 22.15 × 34 =
23. 23.14 × 55 =
24. 24.25 × 32 =
25. 25.45 × 30 =
26. 26.6 × 55 =
27. 27.55 × 24 =
28. 28.125 × 36 =
29. 29.6 × 55 =
30. 30.10 × 45 =
31. 31.65 × 8 =
32. 32.65 × 14 =
33. 33.65 × 12 =
34. 34.35 × 10 =
35. 35.28 × 15 =
36. 36.15 × 6 =
37. 37.38 × 15 =
38. 38.75 × 14 =
39. 39.75 × 18 =
40. 40.8 × 55 =

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