Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 697 · 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. 1.6 × 75 =
2. 2.15 × 32 =
3. 3.34 × 15 =
4. 4.75 × 32 =
5. 5.26 × 55 =
6. 6.65 × 30 =
7. 7.25 × 18 =
8. 8.34 × 75 =
9. 9.125 × 38 =
10. 10.125 × 12 =
11. 11.25 × 40 =
12. 12.10 × 75 =
13. 13.8 × 75 =
14. 14.30 × 45 =
15. 15.65 × 16 =
16. 16.25 × 34 =
17. 17.18 × 45 =
18. 18.6 × 35 =
19. 19.6 × 65 =
20. 20.18 × 25 =
21. 21.10 × 35 =
22. 22.6 × 75 =
23. 23.65 × 18 =
24. 24.25 × 28 =
25. 25.25 × 18 =
26. 26.34 × 15 =
27. 27.32 × 15 =
28. 28.65 × 18 =
29. 29.16 × 15 =
30. 30.35 × 12 =
31. 31.20 × 45 =
32. 32.25 × 20 =
33. 33.25 × 26 =
34. 34.25 × 8 =
35. 35.75 × 28 =
36. 36.25 × 10 =
37. 37.75 × 16 =
38. 38.36 × 15 =
39. 39.65 × 12 =
40. 40.35 × 26 =

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