Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 375 · 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. 1.6 × 75 =
2. 2.22 × 55 =
3. 3.125 × 32 =
4. 4.75 × 6 =
5. 5.55 × 22 =
6. 6.125 × 28 =
7. 7.28 × 125 =
8. 8.75 × 10 =
9. 9.125 × 6 =
10. 10.20 × 25 =
11. 11.16 × 35 =
12. 12.26 × 55 =
13. 13.6 × 125 =
14. 14.35 × 10 =
15. 15.65 × 32 =
16. 16.125 × 24 =
17. 17.24 × 55 =
18. 18.125 × 6 =
19. 19.125 × 14 =
20. 20.25 × 8 =
21. 21.22 × 45 =
22. 22.18 × 75 =
23. 23.55 × 30 =
24. 24.12 × 65 =
25. 25.32 × 35 =
26. 26.35 × 40 =
27. 27.18 × 15 =
28. 28.75 × 40 =
29. 29.125 × 32 =
30. 30.15 × 28 =
31. 31.30 × 55 =
32. 32.25 × 32 =
33. 33.75 × 12 =
34. 34.32 × 125 =
35. 35.8 × 125 =
36. 36.30 × 125 =
37. 37.35 × 40 =
38. 38.55 × 8 =
39. 39.65 × 6 =
40. 40.75 × 38 =

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