Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 983 · 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. 1.35 × 6 =
2. 2.40 × 35 =
3. 3.35 × 28 =
4. 4.28 × 125 =
5. 5.15 × 32 =
6. 6.55 × 10 =
7. 7.25 × 24 =
8. 8.8 × 125 =
9. 9.45 × 14 =
10. 10.25 × 14 =
11. 11.25 × 34 =
12. 12.18 × 35 =
13. 13.18 × 125 =
14. 14.55 × 32 =
15. 15.15 × 10 =
16. 16.35 × 16 =
17. 17.15 × 26 =
18. 18.22 × 75 =
19. 19.125 × 10 =
20. 20.24 × 75 =
21. 21.45 × 38 =
22. 22.15 × 12 =
23. 23.35 × 16 =
24. 24.28 × 125 =
25. 25.15 × 40 =
26. 26.28 × 15 =
27. 27.30 × 35 =
28. 28.75 × 36 =
29. 29.35 × 12 =
30. 30.55 × 6 =
31. 31.45 × 38 =
32. 32.65 × 14 =
33. 33.35 × 6 =
34. 34.12 × 65 =
35. 35.125 × 28 =
36. 36.45 × 32 =
37. 37.35 × 40 =
38. 38.28 × 15 =
39. 39.8 × 35 =
40. 40.25 × 30 =

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