Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 731 · 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. 2.35 × 30 =
3. 3.35 × 36 =
4. 4.18 × 25 =
5. 5.125 × 38 =
6. 6.26 × 35 =
7. 7.15 × 8 =
8. 8.18 × 65 =
9. 9.24 × 55 =
10. 10.38 × 45 =
11. 11.125 × 34 =
12. 12.125 × 12 =
13. 13.25 × 36 =
14. 14.65 × 10 =
15. 15.8 × 45 =
16. 16.24 × 45 =
17. 17.75 × 24 =
18. 18.45 × 26 =
19. 19.35 × 18 =
20. 20.75 × 24 =
21. 21.25 × 22 =
22. 22.32 × 65 =
23. 23.45 × 34 =
24. 24.8 × 55 =
25. 25.25 × 14 =
26. 26.35 × 6 =
27. 27.14 × 45 =
28. 28.28 × 75 =
29. 29.15 × 20 =
30. 30.8 × 15 =
31. 31.38 × 55 =
32. 32.18 × 25 =
33. 33.15 × 28 =
34. 34.24 × 25 =
35. 35.75 × 8 =
36. 36.6 × 75 =
37. 37.125 × 18 =
38. 38.35 × 22 =
39. 39.75 × 40 =
40. 40.35 × 6 =

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