Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 683 · 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. 1.25 × 28 =
2. 2.35 × 28 =
3. 3.30 × 25 =
4. 4.125 × 8 =
5. 5.16 × 15 =
6. 6.10 × 25 =
7. 7.18 × 35 =
8. 8.20 × 35 =
9. 9.75 × 34 =
10. 10.38 × 65 =
11. 11.35 × 6 =
12. 12.40 × 65 =
13. 13.75 × 20 =
14. 14.8 × 35 =
15. 15.8 × 55 =
16. 16.6 × 35 =
17. 17.25 × 14 =
18. 18.30 × 45 =
19. 19.38 × 65 =
20. 20.10 × 25 =
21. 21.40 × 25 =
22. 22.65 × 6 =
23. 23.125 × 10 =
24. 24.10 × 15 =
25. 25.65 × 10 =
26. 26.20 × 125 =
27. 27.55 × 34 =
28. 28.25 × 36 =
29. 29.65 × 16 =
30. 30.22 × 45 =
31. 31.45 × 12 =
32. 32.125 × 10 =
33. 33.24 × 65 =
34. 34.35 × 8 =
35. 35.15 × 6 =
36. 36.25 × 26 =
37. 37.12 × 35 =
38. 38.38 × 45 =
39. 39.15 × 34 =
40. 40.25 × 6 =

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