Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 181 · 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. 1.65 × 32 =
2. 2.35 × 32 =
3. 3.22 × 35 =
4. 4.14 × 75 =
5. 5.10 × 25 =
6. 6.20 × 65 =
7. 7.28 × 125 =
8. 8.65 × 20 =
9. 9.45 × 12 =
10. 10.10 × 125 =
11. 11.26 × 45 =
12. 12.14 × 15 =
13. 13.12 × 25 =
14. 14.15 × 12 =
15. 15.75 × 30 =
16. 16.55 × 40 =
17. 17.40 × 55 =
18. 18.125 × 24 =
19. 19.38 × 65 =
20. 20.24 × 55 =
21. 21.18 × 25 =
22. 22.26 × 15 =
23. 23.45 × 16 =
24. 24.125 × 14 =
25. 25.35 × 18 =
26. 26.12 × 15 =
27. 27.55 × 8 =
28. 28.15 × 14 =
29. 29.16 × 65 =
30. 30.45 × 30 =
31. 31.22 × 75 =
32. 32.32 × 125 =
33. 33.16 × 45 =
34. 34.40 × 15 =
35. 35.16 × 15 =
36. 36.32 × 25 =
37. 37.125 × 32 =
38. 38.38 × 35 =
39. 39.75 × 32 =
40. 40.55 × 18 =

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