Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 880 · 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. 1.15 × 12 =
2. 2.18 × 35 =
3. 3.25 × 10 =
4. 4.22 × 15 =
5. 5.45 × 14 =
6. 6.30 × 55 =
7. 7.55 × 32 =
8. 8.16 × 25 =
9. 9.38 × 65 =
10. 10.32 × 55 =
11. 11.75 × 12 =
12. 12.45 × 40 =
13. 13.38 × 45 =
14. 14.65 × 28 =
15. 15.34 × 35 =
16. 16.18 × 55 =
17. 17.35 × 26 =
18. 18.40 × 25 =
19. 19.22 × 25 =
20. 20.55 × 32 =
21. 21.10 × 75 =
22. 22.25 × 10 =
23. 23.30 × 25 =
24. 24.26 × 75 =
25. 25.65 × 24 =
26. 26.36 × 15 =
27. 27.125 × 6 =
28. 28.75 × 28 =
29. 29.65 × 32 =
30. 30.14 × 65 =
31. 31.32 × 35 =
32. 32.35 × 40 =
33. 33.6 × 45 =
34. 34.34 × 65 =
35. 35.16 × 15 =
36. 36.15 × 38 =
37. 37.25 × 32 =
38. 38.35 × 16 =
39. 39.35 × 32 =
40. 40.25 × 28 =

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