Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 440 · 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 × 16 =
2. 2.20 × 25 =
3. 3.55 × 22 =
4. 4.35 × 38 =
5. 5.75 × 10 =
6. 6.45 × 38 =
7. 7.125 × 24 =
8. 8.45 × 36 =
9. 9.55 × 36 =
10. 10.55 × 6 =
11. 11.12 × 125 =
12. 12.45 × 26 =
13. 13.6 × 55 =
14. 14.18 × 35 =
15. 15.25 × 28 =
16. 16.16 × 125 =
17. 17.55 × 24 =
18. 18.125 × 26 =
19. 19.14 × 125 =
20. 20.34 × 65 =
21. 21.20 × 15 =
22. 22.35 × 6 =
23. 23.75 × 36 =
24. 24.32 × 15 =
25. 25.40 × 15 =
26. 26.25 × 32 =
27. 27.75 × 30 =
28. 28.20 × 125 =
29. 29.55 × 26 =
30. 30.30 × 45 =
31. 31.22 × 55 =
32. 32.15 × 34 =
33. 33.125 × 32 =
34. 34.18 × 75 =
35. 35.25 × 8 =
36. 36.20 × 125 =
37. 37.35 × 40 =
38. 38.65 × 20 =
39. 39.25 × 8 =
40. 40.45 × 10 =

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