Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 454 · 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. 1.45 × 16 =
2. 2.22 × 65 =
3. 3.25 × 20 =
4. 4.16 × 125 =
5. 5.125 × 32 =
6. 6.28 × 65 =
7. 7.25 × 14 =
8. 8.12 × 35 =
9. 9.75 × 34 =
10. 10.25 × 26 =
11. 11.35 × 30 =
12. 12.65 × 38 =
13. 13.18 × 25 =
14. 14.8 × 15 =
15. 15.12 × 25 =
16. 16.24 × 125 =
17. 17.25 × 28 =
18. 18.25 × 34 =
19. 19.15 × 26 =
20. 20.32 × 25 =
21. 21.45 × 10 =
22. 22.38 × 125 =
23. 23.125 × 28 =
24. 24.38 × 15 =
25. 25.20 × 75 =
26. 26.24 × 35 =
27. 27.26 × 15 =
28. 28.16 × 35 =
29. 29.125 × 32 =
30. 30.38 × 45 =
31. 31.75 × 20 =
32. 32.28 × 35 =
33. 33.15 × 8 =
34. 34.18 × 25 =
35. 35.55 × 8 =
36. 36.55 × 28 =
37. 37.55 × 6 =
38. 38.55 × 18 =
39. 39.24 × 35 =
40. 40.26 × 25 =

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