Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 562 · 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. 1.24 × 125 =
2. 2.15 × 36 =
3. 3.24 × 75 =
4. 4.25 × 28 =
5. 5.65 × 22 =
6. 6.15 × 30 =
7. 7.36 × 65 =
8. 8.45 × 16 =
9. 9.25 × 34 =
10. 10.15 × 22 =
11. 11.55 × 8 =
12. 12.10 × 15 =
13. 13.125 × 30 =
14. 14.15 × 32 =
15. 15.20 × 15 =
16. 16.55 × 40 =
17. 17.34 × 25 =
18. 18.65 × 6 =
19. 19.15 × 8 =
20. 20.45 × 32 =
21. 21.15 × 16 =
22. 22.45 × 6 =
23. 23.15 × 16 =
24. 24.40 × 25 =
25. 25.18 × 125 =
26. 26.6 × 125 =
27. 27.16 × 45 =
28. 28.75 × 26 =
29. 29.15 × 10 =
30. 30.10 × 45 =
31. 31.14 × 25 =
32. 32.25 × 38 =
33. 33.12 × 55 =
34. 34.125 × 14 =
35. 35.38 × 75 =
36. 36.8 × 25 =
37. 37.36 × 55 =
38. 38.75 × 22 =
39. 39.45 × 12 =
40. 40.55 × 18 =

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