Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 535 · 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 × 10 =
2. 2.125 × 30 =
3. 3.55 × 32 =
4. 4.125 × 32 =
5. 5.20 × 125 =
6. 6.75 × 32 =
7. 7.12 × 75 =
8. 8.25 × 38 =
9. 9.65 × 28 =
10. 10.15 × 24 =
11. 11.6 × 15 =
12. 12.8 × 15 =
13. 13.40 × 35 =
14. 14.16 × 25 =
15. 15.55 × 14 =
16. 16.18 × 55 =
17. 17.55 × 10 =
18. 18.18 × 35 =
19. 19.16 × 35 =
20. 20.10 × 75 =
21. 21.45 × 22 =
22. 22.25 × 18 =
23. 23.24 × 55 =
24. 24.15 × 18 =
25. 25.8 × 75 =
26. 26.55 × 18 =
27. 27.125 × 36 =
28. 28.75 × 26 =
29. 29.15 × 34 =
30. 30.22 × 75 =
31. 31.34 × 125 =
32. 32.6 × 15 =
33. 33.55 × 40 =
34. 34.25 × 36 =
35. 35.45 × 32 =
36. 36.15 × 36 =
37. 37.34 × 45 =
38. 38.35 × 12 =
39. 39.125 × 38 =
40. 40.6 × 75 =

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