Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 921 · 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. 1.25 × 24 =
2. 2.25 × 34 =
3. 3.15 × 38 =
4. 4.15 × 22 =
5. 5.55 × 32 =
6. 6.65 × 30 =
7. 7.65 × 24 =
8. 8.45 × 12 =
9. 9.35 × 38 =
10. 10.65 × 34 =
11. 11.125 × 8 =
12. 12.8 × 65 =
13. 13.14 × 45 =
14. 14.32 × 55 =
15. 15.22 × 35 =
16. 16.75 × 36 =
17. 17.25 × 12 =
18. 18.45 × 14 =
19. 19.24 × 35 =
20. 20.75 × 28 =
21. 21.12 × 45 =
22. 22.15 × 38 =
23. 23.25 × 32 =
24. 24.32 × 65 =
25. 25.12 × 65 =
26. 26.25 × 36 =
27. 27.55 × 22 =
28. 28.35 × 26 =
29. 29.35 × 20 =
30. 30.25 × 22 =
31. 31.35 × 26 =
32. 32.35 × 6 =
33. 33.25 × 36 =
34. 34.32 × 35 =
35. 35.125 × 34 =
36. 36.75 × 14 =
37. 37.25 × 36 =
38. 38.25 × 28 =
39. 39.65 × 18 =
40. 40.55 × 8 =

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