Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 599 · 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. 1.40 × 15 =
2. 2.14 × 25 =
3. 3.75 × 6 =
4. 4.26 × 45 =
5. 5.16 × 45 =
6. 6.8 × 25 =
7. 7.65 × 28 =
8. 8.65 × 40 =
9. 9.30 × 65 =
10. 10.65 × 18 =
11. 11.25 × 24 =
12. 12.32 × 15 =
13. 13.18 × 65 =
14. 14.25 × 24 =
15. 15.34 × 65 =
16. 16.65 × 20 =
17. 17.25 × 22 =
18. 18.75 × 24 =
19. 19.75 × 26 =
20. 20.125 × 30 =
21. 21.22 × 75 =
22. 22.38 × 25 =
23. 23.32 × 25 =
24. 24.16 × 25 =
25. 25.15 × 10 =
26. 26.22 × 25 =
27. 27.15 × 38 =
28. 28.65 × 28 =
29. 29.32 × 125 =
30. 30.45 × 16 =
31. 31.55 × 6 =
32. 32.12 × 65 =
33. 33.65 × 14 =
34. 34.35 × 36 =
35. 35.35 × 6 =
36. 36.34 × 55 =
37. 37.15 × 26 =
38. 38.125 × 12 =
39. 39.15 × 16 =
40. 40.25 × 36 =

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