Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 255 · 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. 1.18 × 15 =
2. 2.75 × 18 =
3. 3.15 × 34 =
4. 4.75 × 8 =
5. 5.15 × 6 =
6. 6.34 × 45 =
7. 7.25 × 22 =
8. 8.75 × 6 =
9. 9.45 × 38 =
10. 10.25 × 38 =
11. 11.18 × 65 =
12. 12.22 × 45 =
13. 13.75 × 24 =
14. 14.125 × 14 =
15. 15.16 × 35 =
16. 16.65 × 16 =
17. 17.55 × 16 =
18. 18.34 × 25 =
19. 19.45 × 38 =
20. 20.40 × 75 =
21. 21.10 × 25 =
22. 22.55 × 24 =
23. 23.32 × 15 =
24. 24.20 × 75 =
25. 25.125 × 32 =
26. 26.30 × 45 =
27. 27.24 × 125 =
28. 28.8 × 65 =
29. 29.24 × 45 =
30. 30.55 × 6 =
31. 31.18 × 125 =
32. 32.15 × 22 =
33. 33.10 × 15 =
34. 34.24 × 35 =
35. 35.18 × 15 =
36. 36.16 × 125 =
37. 37.75 × 22 =
38. 38.25 × 36 =
39. 39.24 × 125 =
40. 40.25 × 38 =

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