Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 723 · 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. 1.14 × 35 =
2. 2.25 × 10 =
3. 3.25 × 8 =
4. 4.6 × 75 =
5. 5.55 × 8 =
6. 6.14 × 25 =
7. 7.25 × 30 =
8. 8.14 × 65 =
9. 9.34 × 15 =
10. 10.12 × 125 =
11. 11.25 × 30 =
12. 12.24 × 125 =
13. 13.28 × 25 =
14. 14.30 × 35 =
15. 15.65 × 34 =
16. 16.6 × 55 =
17. 17.15 × 12 =
18. 18.12 × 65 =
19. 19.38 × 55 =
20. 20.18 × 15 =
21. 21.30 × 55 =
22. 22.16 × 25 =
23. 23.125 × 34 =
24. 24.16 × 125 =
25. 25.10 × 65 =
26. 26.22 × 25 =
27. 27.15 × 18 =
28. 28.25 × 6 =
29. 29.15 × 6 =
30. 30.8 × 25 =
31. 31.15 × 20 =
32. 32.125 × 38 =
33. 33.25 × 6 =
34. 34.25 × 14 =
35. 35.55 × 16 =
36. 36.25 × 6 =
37. 37.14 × 15 =
38. 38.125 × 22 =
39. 39.125 × 40 =
40. 40.36 × 125 =

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