Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 732 · 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. 1.125 × 22 =
2. 2.55 × 20 =
3. 3.25 × 14 =
4. 4.35 × 34 =
5. 5.15 × 8 =
6. 6.125 × 18 =
7. 7.10 × 25 =
8. 8.45 × 32 =
9. 9.45 × 22 =
10. 10.45 × 18 =
11. 11.15 × 12 =
12. 12.40 × 75 =
13. 13.8 × 25 =
14. 14.32 × 75 =
15. 15.20 × 65 =
16. 16.35 × 6 =
17. 17.40 × 45 =
18. 18.12 × 15 =
19. 19.12 × 125 =
20. 20.28 × 35 =
21. 21.125 × 6 =
22. 22.10 × 65 =
23. 23.35 × 28 =
24. 24.30 × 35 =
25. 25.35 × 32 =
26. 26.35 × 12 =
27. 27.26 × 35 =
28. 28.35 × 20 =
29. 29.10 × 25 =
30. 30.35 × 22 =
31. 31.15 × 28 =
32. 32.12 × 35 =
33. 33.15 × 26 =
34. 34.125 × 38 =
35. 35.22 × 55 =
36. 36.8 × 65 =
37. 37.24 × 125 =
38. 38.35 × 6 =
39. 39.24 × 55 =
40. 40.24 × 15 =

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