Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 728 · 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. 1.12 × 125 =
2. 2.125 × 36 =
3. 3.28 × 55 =
4. 4.26 × 45 =
5. 5.25 × 10 =
6. 6.65 × 16 =
7. 7.15 × 22 =
8. 8.36 × 25 =
9. 9.45 × 32 =
10. 10.35 × 26 =
11. 11.24 × 125 =
12. 12.32 × 125 =
13. 13.75 × 12 =
14. 14.24 × 35 =
15. 15.55 × 30 =
16. 16.40 × 15 =
17. 17.16 × 25 =
18. 18.10 × 35 =
19. 19.20 × 55 =
20. 20.22 × 65 =
21. 21.25 × 40 =
22. 22.55 × 20 =
23. 23.45 × 32 =
24. 24.55 × 38 =
25. 25.75 × 20 =
26. 26.65 × 26 =
27. 27.55 × 12 =
28. 28.26 × 125 =
29. 29.35 × 18 =
30. 30.10 × 35 =
31. 31.8 × 15 =
32. 32.35 × 10 =
33. 33.45 × 32 =
34. 34.65 × 38 =
35. 35.125 × 28 =
36. 36.30 × 65 =
37. 37.75 × 8 =
38. 38.25 × 32 =
39. 39.25 × 14 =
40. 40.125 × 32 =

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