Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 905 · 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 × 18 =
2. 2.125 × 10 =
3. 3.25 × 24 =
4. 4.14 × 25 =
5. 5.28 × 25 =
6. 6.35 × 10 =
7. 7.55 × 12 =
8. 8.35 × 14 =
9. 9.35 × 26 =
10. 10.35 × 18 =
11. 11.26 × 15 =
12. 12.125 × 14 =
13. 13.8 × 55 =
14. 14.15 × 26 =
15. 15.125 × 16 =
16. 16.32 × 35 =
17. 17.25 × 40 =
18. 18.36 × 15 =
19. 19.25 × 14 =
20. 20.35 × 34 =
21. 21.10 × 65 =
22. 22.35 × 12 =
23. 23.14 × 15 =
24. 24.55 × 24 =
25. 25.8 × 25 =
26. 26.30 × 45 =
27. 27.30 × 15 =
28. 28.14 × 45 =
29. 29.15 × 26 =
30. 30.55 × 32 =
31. 31.10 × 15 =
32. 32.16 × 65 =
33. 33.10 × 45 =
34. 34.75 × 30 =
35. 35.34 × 15 =
36. 36.55 × 18 =
37. 37.25 × 10 =
38. 38.15 × 8 =
39. 39.32 × 125 =
40. 40.65 × 14 =

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