Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 756 · 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. 2.35 × 32 =
3. 3.22 × 65 =
4. 4.75 × 36 =
5. 5.12 × 15 =
6. 6.20 × 45 =
7. 7.125 × 34 =
8. 8.16 × 35 =
9. 9.8 × 25 =
10. 10.35 × 6 =
11. 11.45 × 14 =
12. 12.15 × 28 =
13. 13.30 × 35 =
14. 14.35 × 16 =
15. 15.65 × 40 =
16. 16.35 × 34 =
17. 17.15 × 28 =
18. 18.36 × 65 =
19. 19.75 × 32 =
20. 20.20 × 125 =
21. 21.36 × 35 =
22. 22.28 × 25 =
23. 23.75 × 24 =
24. 24.40 × 75 =
25. 25.125 × 14 =
26. 26.75 × 10 =
27. 27.65 × 16 =
28. 28.25 × 28 =
29. 29.35 × 8 =
30. 30.65 × 28 =
31. 31.15 × 30 =
32. 32.34 × 55 =
33. 33.55 × 14 =
34. 34.40 × 55 =
35. 35.40 × 15 =
36. 36.55 × 14 =
37. 37.15 × 22 =
38. 38.12 × 15 =
39. 39.32 × 55 =
40. 40.45 × 6 =

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