Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 49 · 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. 2.55 × 26 =
3. 3.25 × 22 =
4. 4.65 × 14 =
5. 5.38 × 35 =
6. 6.35 × 6 =
7. 7.65 × 18 =
8. 8.65 × 40 =
9. 9.32 × 25 =
10. 10.12 × 15 =
11. 11.55 × 24 =
12. 12.6 × 55 =
13. 13.45 × 10 =
14. 14.45 × 30 =
15. 15.22 × 25 =
16. 16.35 × 32 =
17. 17.14 × 45 =
18. 18.40 × 35 =
19. 19.10 × 15 =
20. 20.15 × 10 =
21. 21.12 × 55 =
22. 22.25 × 6 =
23. 23.75 × 26 =
24. 24.55 × 32 =
25. 25.24 × 55 =
26. 26.12 × 65 =
27. 27.25 × 16 =
28. 28.15 × 6 =
29. 29.18 × 65 =
30. 30.40 × 15 =
31. 31.30 × 75 =
32. 32.55 × 24 =
33. 33.75 × 14 =
34. 34.36 × 75 =
35. 35.28 × 15 =
36. 36.65 × 6 =
37. 37.75 × 16 =
38. 38.30 × 65 =
39. 39.35 × 30 =
40. 40.15 × 6 =

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