Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 720 · 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 × 75 =
2. 2.75 × 36 =
3. 3.25 × 26 =
4. 4.35 × 36 =
5. 5.6 × 45 =
6. 6.26 × 55 =
7. 7.15 × 6 =
8. 8.75 × 28 =
9. 9.25 × 28 =
10. 10.40 × 25 =
11. 11.38 × 25 =
12. 12.20 × 25 =
13. 13.15 × 14 =
14. 14.15 × 8 =
15. 15.65 × 32 =
16. 16.65 × 24 =
17. 17.25 × 40 =
18. 18.30 × 45 =
19. 19.25 × 6 =
20. 20.75 × 36 =
21. 21.36 × 125 =
22. 22.25 × 18 =
23. 23.18 × 75 =
24. 24.36 × 45 =
25. 25.14 × 45 =
26. 26.12 × 15 =
27. 27.10 × 65 =
28. 28.38 × 25 =
29. 29.25 × 16 =
30. 30.10 × 65 =
31. 31.25 × 30 =
32. 32.15 × 38 =
33. 33.24 × 125 =
34. 34.25 × 26 =
35. 35.125 × 10 =
36. 36.25 × 14 =
37. 37.14 × 55 =
38. 38.28 × 35 =
39. 39.12 × 35 =
40. 40.35 × 16 =

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