Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 561 · 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. 1.24 × 75 =
2. 2.18 × 15 =
3. 3.10 × 45 =
4. 4.32 × 15 =
5. 5.55 × 18 =
6. 6.30 × 25 =
7. 7.12 × 55 =
8. 8.10 × 125 =
9. 9.75 × 32 =
10. 10.36 × 35 =
11. 11.65 × 36 =
12. 12.75 × 30 =
13. 13.14 × 35 =
14. 14.20 × 25 =
15. 15.18 × 125 =
16. 16.12 × 65 =
17. 17.15 × 28 =
18. 18.65 × 28 =
19. 19.6 × 125 =
20. 20.16 × 35 =
21. 21.22 × 35 =
22. 22.65 × 14 =
23. 23.25 × 28 =
24. 24.75 × 18 =
25. 25.18 × 35 =
26. 26.125 × 14 =
27. 27.16 × 125 =
28. 28.6 × 65 =
29. 29.14 × 45 =
30. 30.36 × 25 =
31. 31.24 × 125 =
32. 32.22 × 55 =
33. 33.35 × 18 =
34. 34.75 × 40 =
35. 35.65 × 28 =
36. 36.125 × 28 =
37. 37.45 × 6 =
38. 38.22 × 15 =
39. 39.32 × 65 =
40. 40.75 × 30 =

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