Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 256 · 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. 1.25 × 40 =
2. 2.6 × 25 =
3. 3.32 × 15 =
4. 4.55 × 30 =
5. 5.16 × 65 =
6. 6.6 × 75 =
7. 7.18 × 15 =
8. 8.22 × 65 =
9. 9.6 × 55 =
10. 10.25 × 8 =
11. 11.125 × 32 =
12. 12.20 × 55 =
13. 13.125 × 6 =
14. 14.55 × 32 =
15. 15.12 × 45 =
16. 16.125 × 12 =
17. 17.65 × 26 =
18. 18.10 × 25 =
19. 19.45 × 16 =
20. 20.12 × 25 =
21. 21.125 × 10 =
22. 22.15 × 10 =
23. 23.32 × 75 =
24. 24.8 × 65 =
25. 25.14 × 25 =
26. 26.125 × 40 =
27. 27.75 × 34 =
28. 28.15 × 34 =
29. 29.32 × 15 =
30. 30.14 × 35 =
31. 31.25 × 10 =
32. 32.36 × 55 =
33. 33.30 × 35 =
34. 34.55 × 18 =
35. 35.24 × 75 =
36. 36.65 × 16 =
37. 37.45 × 32 =
38. 38.36 × 55 =
39. 39.24 × 35 =
40. 40.34 × 15 =

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