Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 517 · 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. 1.10 × 55 =
2. 2.125 × 24 =
3. 3.24 × 65 =
4. 4.65 × 6 =
5. 5.75 × 26 =
6. 6.75 × 40 =
7. 7.55 × 28 =
8. 8.20 × 75 =
9. 9.16 × 25 =
10. 10.30 × 25 =
11. 11.36 × 55 =
12. 12.15 × 10 =
13. 13.25 × 22 =
14. 14.55 × 26 =
15. 15.8 × 125 =
16. 16.8 × 125 =
17. 17.35 × 18 =
18. 18.25 × 22 =
19. 19.10 × 35 =
20. 20.15 × 12 =
21. 21.12 × 45 =
22. 22.18 × 45 =
23. 23.38 × 65 =
24. 24.10 × 65 =
25. 25.75 × 18 =
26. 26.75 × 16 =
27. 27.40 × 75 =
28. 28.55 × 18 =
29. 29.55 × 34 =
30. 30.35 × 12 =
31. 31.55 × 24 =
32. 32.26 × 55 =
33. 33.65 × 10 =
34. 34.125 × 38 =
35. 35.14 × 35 =
36. 36.40 × 75 =
37. 37.40 × 75 =
38. 38.30 × 75 =
39. 39.6 × 75 =
40. 40.35 × 20 =

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