Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 759 · 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. 2.45 × 16 =
3. 3.55 × 22 =
4. 4.32 × 75 =
5. 5.14 × 25 =
6. 6.28 × 75 =
7. 7.45 × 16 =
8. 8.26 × 35 =
9. 9.36 × 65 =
10. 10.32 × 35 =
11. 11.24 × 25 =
12. 12.125 × 34 =
13. 13.75 × 14 =
14. 14.22 × 45 =
15. 15.35 × 10 =
16. 16.24 × 45 =
17. 17.32 × 15 =
18. 18.10 × 55 =
19. 19.125 × 22 =
20. 20.18 × 25 =
21. 21.75 × 28 =
22. 22.26 × 35 =
23. 23.65 × 38 =
24. 24.15 × 10 =
25. 25.45 × 32 =
26. 26.6 × 55 =
27. 27.35 × 8 =
28. 28.36 × 35 =
29. 29.36 × 45 =
30. 30.15 × 10 =
31. 31.55 × 12 =
32. 32.6 × 55 =
33. 33.12 × 25 =
34. 34.15 × 18 =
35. 35.10 × 65 =
36. 36.24 × 45 =
37. 37.55 × 10 =
38. 38.55 × 14 =
39. 39.18 × 65 =
40. 40.38 × 45 =

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