Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 125 · 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 × 25 =
2. 2.32 × 55 =
3. 3.22 × 55 =
4. 4.45 × 20 =
5. 5.20 × 55 =
6. 6.45 × 32 =
7. 7.20 × 65 =
8. 8.45 × 8 =
9. 9.40 × 25 =
10. 10.125 × 6 =
11. 11.12 × 35 =
12. 12.55 × 30 =
13. 13.55 × 10 =
14. 14.36 × 45 =
15. 15.65 × 38 =
16. 16.28 × 75 =
17. 17.35 × 38 =
18. 18.65 × 22 =
19. 19.45 × 36 =
20. 20.75 × 34 =
21. 21.20 × 75 =
22. 22.35 × 34 =
23. 23.8 × 35 =
24. 24.75 × 34 =
25. 25.125 × 12 =
26. 26.45 × 16 =
27. 27.40 × 75 =
28. 28.45 × 26 =
29. 29.12 × 75 =
30. 30.15 × 28 =
31. 31.15 × 26 =
32. 32.28 × 35 =
33. 33.16 × 25 =
34. 34.6 × 55 =
35. 35.14 × 15 =
36. 36.15 × 26 =
37. 37.125 × 34 =
38. 38.75 × 16 =
39. 39.65 × 8 =
40. 40.30 × 125 =

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