Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 515 · 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. 1.6 × 75 =
2. 2.10 × 55 =
3. 3.55 × 28 =
4. 4.125 × 20 =
5. 5.32 × 55 =
6. 6.6 × 25 =
7. 7.25 × 30 =
8. 8.28 × 65 =
9. 9.20 × 45 =
10. 10.40 × 65 =
11. 11.10 × 15 =
12. 12.75 × 20 =
13. 13.40 × 65 =
14. 14.12 × 45 =
15. 15.10 × 65 =
16. 16.34 × 55 =
17. 17.6 × 125 =
18. 18.26 × 55 =
19. 19.10 × 65 =
20. 20.24 × 15 =
21. 21.15 × 10 =
22. 22.125 × 22 =
23. 23.10 × 25 =
24. 24.20 × 55 =
25. 25.25 × 10 =
26. 26.20 × 15 =
27. 27.65 × 12 =
28. 28.35 × 6 =
29. 29.55 × 14 =
30. 30.8 × 55 =
31. 31.8 × 35 =
32. 32.55 × 12 =
33. 33.65 × 40 =
34. 34.26 × 75 =
35. 35.36 × 25 =
36. 36.55 × 10 =
37. 37.125 × 22 =
38. 38.45 × 36 =
39. 39.16 × 55 =
40. 40.35 × 20 =

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