Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 19 · 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 × 75 =
2. 2.20 × 25 =
3. 3.25 × 22 =
4. 4.25 × 6 =
5. 5.35 × 14 =
6. 6.25 × 24 =
7. 7.45 × 24 =
8. 8.22 × 45 =
9. 9.34 × 45 =
10. 10.45 × 8 =
11. 11.35 × 28 =
12. 12.20 × 15 =
13. 13.16 × 15 =
14. 14.15 × 10 =
15. 15.55 × 6 =
16. 16.8 × 65 =
17. 17.15 × 14 =
18. 18.125 × 14 =
19. 19.12 × 15 =
20. 20.32 × 45 =
21. 21.65 × 18 =
22. 22.24 × 65 =
23. 23.45 × 18 =
24. 24.75 × 22 =
25. 25.45 × 18 =
26. 26.20 × 65 =
27. 27.40 × 45 =
28. 28.55 × 26 =
29. 29.18 × 55 =
30. 30.32 × 125 =
31. 31.12 × 35 =
32. 32.12 × 75 =
33. 33.22 × 25 =
34. 34.10 × 125 =
35. 35.20 × 15 =
36. 36.22 × 65 =
37. 37.10 × 45 =
38. 38.10 × 15 =
39. 39.55 × 32 =
40. 40.20 × 65 =

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