Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 725 · 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. 1.32 × 25 =
2. 2.12 × 25 =
3. 3.28 × 25 =
4. 4.25 × 6 =
5. 5.55 × 26 =
6. 6.45 × 16 =
7. 7.15 × 10 =
8. 8.6 × 125 =
9. 9.38 × 15 =
10. 10.10 × 55 =
11. 11.8 × 125 =
12. 12.45 × 26 =
13. 13.15 × 32 =
14. 14.25 × 8 =
15. 15.10 × 65 =
16. 16.30 × 15 =
17. 17.15 × 32 =
18. 18.125 × 20 =
19. 19.75 × 36 =
20. 20.25 × 12 =
21. 21.34 × 125 =
22. 22.24 × 65 =
23. 23.35 × 26 =
24. 24.24 × 65 =
25. 25.24 × 15 =
26. 26.75 × 12 =
27. 27.20 × 65 =
28. 28.75 × 6 =
29. 29.18 × 65 =
30. 30.125 × 8 =
31. 31.75 × 8 =
32. 32.125 × 20 =
33. 33.38 × 75 =
34. 34.10 × 35 =
35. 35.38 × 45 =
36. 36.30 × 45 =
37. 37.15 × 38 =
38. 38.55 × 20 =
39. 39.22 × 35 =
40. 40.45 × 10 =

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