Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 84 · 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. 1.20 × 125 =
2. 2.30 × 75 =
3. 3.16 × 45 =
4. 4.75 × 26 =
5. 5.40 × 35 =
6. 6.45 × 24 =
7. 7.6 × 125 =
8. 8.22 × 55 =
9. 9.14 × 15 =
10. 10.12 × 65 =
11. 11.40 × 35 =
12. 12.32 × 125 =
13. 13.16 × 45 =
14. 14.8 × 25 =
15. 15.35 × 12 =
16. 16.16 × 15 =
17. 17.24 × 75 =
18. 18.36 × 45 =
19. 19.22 × 35 =
20. 20.16 × 65 =
21. 21.6 × 65 =
22. 22.25 × 38 =
23. 23.55 × 8 =
24. 24.15 × 22 =
25. 25.125 × 20 =
26. 26.55 × 24 =
27. 27.125 × 20 =
28. 28.75 × 32 =
29. 29.12 × 25 =
30. 30.65 × 18 =
31. 31.65 × 36 =
32. 32.65 × 28 =
33. 33.75 × 36 =
34. 34.15 × 10 =
35. 35.55 × 16 =
36. 36.16 × 15 =
37. 37.65 × 14 =
38. 38.24 × 35 =
39. 39.55 × 14 =
40. 40.10 × 55 =

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