Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 713 · 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. 1.25 × 14 =
2. 2.75 × 38 =
3. 3.65 × 32 =
4. 4.15 × 16 =
5. 5.30 × 65 =
6. 6.30 × 25 =
7. 7.32 × 15 =
8. 8.24 × 75 =
9. 9.35 × 10 =
10. 10.125 × 26 =
11. 11.30 × 45 =
12. 12.15 × 20 =
13. 13.12 × 55 =
14. 14.25 × 30 =
15. 15.22 × 125 =
16. 16.32 × 65 =
17. 17.20 × 35 =
18. 18.12 × 75 =
19. 19.10 × 75 =
20. 20.45 × 24 =
21. 21.125 × 36 =
22. 22.35 × 28 =
23. 23.25 × 22 =
24. 24.16 × 25 =
25. 25.22 × 35 =
26. 26.36 × 75 =
27. 27.45 × 30 =
28. 28.125 × 40 =
29. 29.18 × 125 =
30. 30.28 × 55 =
31. 31.15 × 38 =
32. 32.15 × 12 =
33. 33.55 × 32 =
34. 34.65 × 24 =
35. 35.75 × 10 =
36. 36.30 × 25 =
37. 37.55 × 36 =
38. 38.8 × 125 =
39. 39.15 × 14 =
40. 40.35 × 30 =

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