Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 523 · 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. 1.20 × 75 =
2. 2.55 × 14 =
3. 3.15 × 38 =
4. 4.55 × 6 =
5. 5.25 × 16 =
6. 6.6 × 125 =
7. 7.15 × 18 =
8. 8.15 × 38 =
9. 9.26 × 125 =
10. 10.22 × 45 =
11. 11.30 × 55 =
12. 12.10 × 65 =
13. 13.38 × 55 =
14. 14.34 × 25 =
15. 15.25 × 12 =
16. 16.38 × 25 =
17. 17.14 × 55 =
18. 18.12 × 75 =
19. 19.55 × 12 =
20. 20.12 × 35 =
21. 21.15 × 14 =
22. 22.22 × 25 =
23. 23.55 × 12 =
24. 24.65 × 28 =
25. 25.40 × 25 =
26. 26.65 × 26 =
27. 27.25 × 14 =
28. 28.35 × 20 =
29. 29.32 × 45 =
30. 30.25 × 30 =
31. 31.26 × 45 =
32. 32.45 × 38 =
33. 33.15 × 40 =
34. 34.10 × 55 =
35. 35.75 × 40 =
36. 36.15 × 32 =
37. 37.45 × 22 =
38. 38.25 × 12 =
39. 39.65 × 10 =
40. 40.28 × 55 =

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