Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 745 · 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 × 32 =
2. 2.125 × 36 =
3. 3.125 × 34 =
4. 4.10 × 35 =
5. 5.6 × 25 =
6. 6.45 × 20 =
7. 7.14 × 55 =
8. 8.25 × 30 =
9. 9.34 × 125 =
10. 10.22 × 55 =
11. 11.55 × 28 =
12. 12.55 × 6 =
13. 13.75 × 20 =
14. 14.25 × 32 =
15. 15.35 × 40 =
16. 16.36 × 35 =
17. 17.18 × 65 =
18. 18.75 × 22 =
19. 19.22 × 65 =
20. 20.38 × 125 =
21. 21.24 × 65 =
22. 22.25 × 24 =
23. 23.35 × 32 =
24. 24.45 × 6 =
25. 25.25 × 32 =
26. 26.12 × 125 =
27. 27.25 × 16 =
28. 28.32 × 15 =
29. 29.18 × 65 =
30. 30.15 × 30 =
31. 31.65 × 34 =
32. 32.75 × 18 =
33. 33.12 × 55 =
34. 34.18 × 25 =
35. 35.15 × 40 =
36. 36.12 × 125 =
37. 37.65 × 16 =
38. 38.35 × 28 =
39. 39.20 × 65 =
40. 40.6 × 75 =

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