Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 940 · 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. 1.125 × 18 =
2. 2.22 × 35 =
3. 3.55 × 36 =
4. 4.65 × 24 =
5. 5.38 × 75 =
6. 6.10 × 125 =
7. 7.16 × 65 =
8. 8.20 × 125 =
9. 9.32 × 125 =
10. 10.125 × 12 =
11. 11.45 × 14 =
12. 12.25 × 30 =
13. 13.35 × 36 =
14. 14.75 × 22 =
15. 15.15 × 16 =
16. 16.75 × 8 =
17. 17.40 × 15 =
18. 18.28 × 15 =
19. 19.10 × 65 =
20. 20.12 × 35 =
21. 21.6 × 65 =
22. 22.20 × 35 =
23. 23.75 × 30 =
24. 24.35 × 10 =
25. 25.75 × 14 =
26. 26.20 × 25 =
27. 27.10 × 25 =
28. 28.25 × 38 =
29. 29.15 × 12 =
30. 30.15 × 28 =
31. 31.35 × 30 =
32. 32.45 × 8 =
33. 33.40 × 35 =
34. 34.8 × 25 =
35. 35.45 × 24 =
36. 36.15 × 18 =
37. 37.8 × 55 =
38. 38.75 × 32 =
39. 39.24 × 45 =
40. 40.25 × 14 =

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