Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 364 · 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. 1.32 × 125 =
2. 2.40 × 75 =
3. 3.55 × 20 =
4. 4.45 × 22 =
5. 5.45 × 8 =
6. 6.35 × 22 =
7. 7.24 × 25 =
8. 8.45 × 34 =
9. 9.30 × 125 =
10. 10.24 × 65 =
11. 11.45 × 18 =
12. 12.45 × 22 =
13. 13.75 × 30 =
14. 14.36 × 45 =
15. 15.6 × 35 =
16. 16.20 × 35 =
17. 17.65 × 12 =
18. 18.25 × 14 =
19. 19.125 × 8 =
20. 20.15 × 10 =
21. 21.45 × 32 =
22. 22.16 × 35 =
23. 23.35 × 12 =
24. 24.30 × 25 =
25. 25.75 × 36 =
26. 26.24 × 45 =
27. 27.12 × 65 =
28. 28.15 × 28 =
29. 29.55 × 32 =
30. 30.14 × 25 =
31. 31.12 × 65 =
32. 32.38 × 25 =
33. 33.45 × 10 =
34. 34.65 × 32 =
35. 35.26 × 125 =
36. 36.38 × 35 =
37. 37.34 × 125 =
38. 38.28 × 45 =
39. 39.26 × 15 =
40. 40.25 × 20 =

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