Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 482 · 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. 1.18 × 55 =
2. 2.25 × 18 =
3. 3.25 × 24 =
4. 4.55 × 14 =
5. 5.38 × 45 =
6. 6.6 × 55 =
7. 7.65 × 12 =
8. 8.45 × 20 =
9. 9.40 × 15 =
10. 10.36 × 15 =
11. 11.26 × 45 =
12. 12.65 × 38 =
13. 13.15 × 6 =
14. 14.15 × 36 =
15. 15.26 × 125 =
16. 16.24 × 125 =
17. 17.65 × 22 =
18. 18.8 × 125 =
19. 19.25 × 38 =
20. 20.10 × 65 =
21. 21.15 × 24 =
22. 22.25 × 14 =
23. 23.55 × 24 =
24. 24.15 × 34 =
25. 25.15 × 12 =
26. 26.28 × 55 =
27. 27.32 × 65 =
28. 28.22 × 55 =
29. 29.30 × 25 =
30. 30.55 × 22 =
31. 31.12 × 125 =
32. 32.25 × 12 =
33. 33.65 × 12 =
34. 34.15 × 32 =
35. 35.25 × 18 =
36. 36.125 × 36 =
37. 37.45 × 36 =
38. 38.75 × 32 =
39. 39.125 × 8 =
40. 40.35 × 28 =

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