Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 989 · 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. 1.65 × 24 =
2. 2.25 × 12 =
3. 3.40 × 15 =
4. 4.18 × 75 =
5. 5.55 × 26 =
6. 6.16 × 25 =
7. 7.26 × 35 =
8. 8.65 × 34 =
9. 9.35 × 40 =
10. 10.40 × 65 =
11. 11.75 × 14 =
12. 12.16 × 45 =
13. 13.12 × 25 =
14. 14.25 × 10 =
15. 15.45 × 12 =
16. 16.10 × 35 =
17. 17.15 × 14 =
18. 18.10 × 45 =
19. 19.28 × 25 =
20. 20.75 × 38 =
21. 21.45 × 22 =
22. 22.35 × 38 =
23. 23.14 × 35 =
24. 24.28 × 35 =
25. 25.25 × 14 =
26. 26.65 × 12 =
27. 27.45 × 26 =
28. 28.65 × 30 =
29. 29.15 × 10 =
30. 30.14 × 25 =
31. 31.28 × 125 =
32. 32.35 × 18 =
33. 33.6 × 125 =
34. 34.75 × 6 =
35. 35.125 × 26 =
36. 36.55 × 6 =
37. 37.35 × 18 =
38. 38.55 × 28 =
39. 39.35 × 6 =
40. 40.10 × 65 =

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