Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 100 · 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. 2.25 × 18 =
3. 3.15 × 36 =
4. 4.8 × 65 =
5. 5.8 × 75 =
6. 6.45 × 20 =
7. 7.45 × 18 =
8. 8.35 × 14 =
9. 9.15 × 6 =
10. 10.32 × 125 =
11. 11.18 × 25 =
12. 12.55 × 34 =
13. 13.65 × 8 =
14. 14.8 × 15 =
15. 15.6 × 55 =
16. 16.6 × 45 =
17. 17.16 × 25 =
18. 18.15 × 8 =
19. 19.10 × 25 =
20. 20.12 × 35 =
21. 21.16 × 35 =
22. 22.35 × 16 =
23. 23.38 × 55 =
24. 24.38 × 45 =
25. 25.35 × 28 =
26. 26.25 × 26 =
27. 27.25 × 26 =
28. 28.55 × 32 =
29. 29.22 × 25 =
30. 30.75 × 6 =
31. 31.25 × 12 =
32. 32.35 × 20 =
33. 33.35 × 6 =
34. 34.16 × 35 =
35. 35.125 × 22 =
36. 36.15 × 12 =
37. 37.75 × 6 =
38. 38.40 × 35 =
39. 39.25 × 14 =
40. 40.75 × 40 =

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