Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 540 · 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. 1.36 × 75 =
2. 2.18 × 55 =
3. 3.8 × 45 =
4. 4.125 × 32 =
5. 5.14 × 45 =
6. 6.35 × 16 =
7. 7.55 × 24 =
8. 8.10 × 125 =
9. 9.12 × 65 =
10. 10.40 × 75 =
11. 11.32 × 75 =
12. 12.65 × 30 =
13. 13.6 × 15 =
14. 14.125 × 18 =
15. 15.125 × 10 =
16. 16.22 × 125 =
17. 17.18 × 15 =
18. 18.75 × 28 =
19. 19.15 × 12 =
20. 20.45 × 22 =
21. 21.24 × 25 =
22. 22.75 × 18 =
23. 23.36 × 35 =
24. 24.16 × 25 =
25. 25.6 × 15 =
26. 26.28 × 65 =
27. 27.75 × 6 =
28. 28.16 × 55 =
29. 29.20 × 55 =
30. 30.38 × 25 =
31. 31.40 × 65 =
32. 32.8 × 75 =
33. 33.12 × 125 =
34. 34.55 × 18 =
35. 35.35 × 18 =
36. 36.55 × 14 =
37. 37.14 × 45 =
38. 38.30 × 65 =
39. 39.45 × 14 =
40. 40.20 × 65 =

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