Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 68 · 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. 1.20 × 125 =
2. 2.14 × 25 =
3. 3.26 × 45 =
4. 4.36 × 15 =
5. 5.22 × 75 =
6. 6.125 × 32 =
7. 7.8 × 15 =
8. 8.15 × 22 =
9. 9.24 × 125 =
10. 10.15 × 14 =
11. 11.22 × 15 =
12. 12.15 × 26 =
13. 13.15 × 32 =
14. 14.25 × 14 =
15. 15.15 × 32 =
16. 16.55 × 16 =
17. 17.14 × 45 =
18. 18.32 × 55 =
19. 19.45 × 32 =
20. 20.10 × 35 =
21. 21.25 × 30 =
22. 22.38 × 25 =
23. 23.24 × 55 =
24. 24.35 × 12 =
25. 25.15 × 16 =
26. 26.22 × 75 =
27. 27.6 × 75 =
28. 28.25 × 20 =
29. 29.12 × 125 =
30. 30.16 × 25 =
31. 31.65 × 22 =
32. 32.65 × 40 =
33. 33.24 × 45 =
34. 34.65 × 12 =
35. 35.25 × 8 =
36. 36.15 × 22 =
37. 37.38 × 75 =
38. 38.75 × 16 =
39. 39.15 × 40 =
40. 40.125 × 28 =

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