Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 673 · 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. 1.28 × 125 =
2. 2.75 × 6 =
3. 3.15 × 16 =
4. 4.55 × 22 =
5. 5.65 × 30 =
6. 6.20 × 45 =
7. 7.75 × 12 =
8. 8.28 × 25 =
9. 9.40 × 15 =
10. 10.26 × 65 =
11. 11.18 × 45 =
12. 12.125 × 10 =
13. 13.65 × 14 =
14. 14.12 × 35 =
15. 15.10 × 75 =
16. 16.14 × 65 =
17. 17.36 × 55 =
18. 18.12 × 65 =
19. 19.8 × 65 =
20. 20.6 × 25 =
21. 21.45 × 22 =
22. 22.65 × 16 =
23. 23.75 × 32 =
24. 24.15 × 36 =
25. 25.25 × 24 =
26. 26.25 × 6 =
27. 27.35 × 14 =
28. 28.65 × 10 =
29. 29.15 × 34 =
30. 30.45 × 28 =
31. 31.15 × 32 =
32. 32.22 × 125 =
33. 33.55 × 18 =
34. 34.55 × 8 =
35. 35.10 × 25 =
36. 36.15 × 24 =
37. 37.75 × 38 =
38. 38.16 × 65 =
39. 39.55 × 10 =
40. 40.75 × 40 =

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