Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 752 · 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. 1.40 × 125 =
2. 2.32 × 65 =
3. 3.18 × 75 =
4. 4.12 × 45 =
5. 5.125 × 38 =
6. 6.12 × 65 =
7. 7.10 × 65 =
8. 8.75 × 38 =
9. 9.45 × 20 =
10. 10.25 × 34 =
11. 11.55 × 34 =
12. 12.6 × 35 =
13. 13.12 × 55 =
14. 14.25 × 40 =
15. 15.20 × 125 =
16. 16.15 × 10 =
17. 17.18 × 55 =
18. 18.35 × 34 =
19. 19.55 × 34 =
20. 20.75 × 16 =
21. 21.55 × 34 =
22. 22.6 × 125 =
23. 23.125 × 30 =
24. 24.75 × 24 =
25. 25.35 × 18 =
26. 26.55 × 26 =
27. 27.26 × 55 =
28. 28.34 × 25 =
29. 29.22 × 55 =
30. 30.125 × 10 =
31. 31.125 × 28 =
32. 32.20 × 75 =
33. 33.24 × 35 =
34. 34.65 × 10 =
35. 35.30 × 65 =
36. 36.18 × 125 =
37. 37.30 × 15 =
38. 38.25 × 12 =
39. 39.6 × 25 =
40. 40.15 × 16 =

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