Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 609 · 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. 1.24 × 75 =
2. 2.25 × 30 =
3. 3.25 × 38 =
4. 4.14 × 25 =
5. 5.18 × 35 =
6. 6.25 × 10 =
7. 7.35 × 22 =
8. 8.18 × 25 =
9. 9.20 × 125 =
10. 10.55 × 14 =
11. 11.22 × 45 =
12. 12.20 × 25 =
13. 13.26 × 65 =
14. 14.16 × 35 =
15. 15.14 × 15 =
16. 16.10 × 25 =
17. 17.35 × 6 =
18. 18.55 × 24 =
19. 19.45 × 14 =
20. 20.65 × 22 =
21. 21.45 × 32 =
22. 22.16 × 55 =
23. 23.36 × 75 =
24. 24.6 × 125 =
25. 25.12 × 25 =
26. 26.32 × 125 =
27. 27.14 × 125 =
28. 28.15 × 18 =
29. 29.45 × 40 =
30. 30.16 × 15 =
31. 31.15 × 38 =
32. 32.25 × 14 =
33. 33.35 × 24 =
34. 34.25 × 16 =
35. 35.16 × 55 =
36. 36.40 × 35 =
37. 37.45 × 36 =
38. 38.45 × 20 =
39. 39.14 × 55 =
40. 40.35 × 14 =

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