Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 387 · 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. 1.10 × 125 =
2. 2.20 × 55 =
3. 3.75 × 28 =
4. 4.35 × 6 =
5. 5.25 × 16 =
6. 6.55 × 40 =
7. 7.32 × 65 =
8. 8.75 × 8 =
9. 9.16 × 25 =
10. 10.125 × 16 =
11. 11.8 × 25 =
12. 12.15 × 26 =
13. 13.6 × 25 =
14. 14.55 × 10 =
15. 15.25 × 30 =
16. 16.75 × 10 =
17. 17.25 × 14 =
18. 18.15 × 22 =
19. 19.65 × 8 =
20. 20.55 × 14 =
21. 21.25 × 24 =
22. 22.15 × 30 =
23. 23.18 × 15 =
24. 24.16 × 35 =
25. 25.8 × 35 =
26. 26.55 × 38 =
27. 27.35 × 36 =
28. 28.24 × 125 =
29. 29.25 × 32 =
30. 30.35 × 34 =
31. 31.15 × 18 =
32. 32.40 × 125 =
33. 33.30 × 15 =
34. 34.25 × 16 =
35. 35.35 × 16 =
36. 36.55 × 20 =
37. 37.25 × 18 =
38. 38.32 × 75 =
39. 39.55 × 22 =
40. 40.20 × 25 =

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