Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 351 · 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. 1.20 × 45 =
2. 2.55 × 32 =
3. 3.15 × 8 =
4. 4.45 × 28 =
5. 5.25 × 18 =
6. 6.25 × 26 =
7. 7.20 × 55 =
8. 8.30 × 45 =
9. 9.18 × 125 =
10. 10.38 × 35 =
11. 11.18 × 15 =
12. 12.45 × 8 =
13. 13.12 × 15 =
14. 14.14 × 55 =
15. 15.34 × 55 =
16. 16.75 × 26 =
17. 17.75 × 20 =
18. 18.34 × 15 =
19. 19.125 × 28 =
20. 20.75 × 14 =
21. 21.8 × 125 =
22. 22.16 × 65 =
23. 23.15 × 30 =
24. 24.125 × 18 =
25. 25.34 × 45 =
26. 26.15 × 34 =
27. 27.55 × 18 =
28. 28.30 × 125 =
29. 29.75 × 38 =
30. 30.36 × 15 =
31. 31.65 × 26 =
32. 32.45 × 24 =
33. 33.65 × 28 =
34. 34.40 × 65 =
35. 35.15 × 32 =
36. 36.15 × 10 =
37. 37.25 × 22 =
38. 38.40 × 55 =
39. 39.16 × 55 =
40. 40.45 × 14 =

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