Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 60 · 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. 1.28 × 75 =
2. 2.40 × 45 =
3. 3.14 × 35 =
4. 4.24 × 15 =
5. 5.75 × 24 =
6. 6.8 × 15 =
7. 7.65 × 38 =
8. 8.30 × 55 =
9. 9.65 × 38 =
10. 10.45 × 20 =
11. 11.14 × 25 =
12. 12.25 × 8 =
13. 13.55 × 34 =
14. 14.65 × 20 =
15. 15.75 × 22 =
16. 16.15 × 40 =
17. 17.16 × 45 =
18. 18.75 × 12 =
19. 19.12 × 25 =
20. 20.45 × 22 =
21. 21.30 × 35 =
22. 22.35 × 18 =
23. 23.36 × 125 =
24. 24.20 × 35 =
25. 25.75 × 20 =
26. 26.22 × 25 =
27. 27.28 × 15 =
28. 28.8 × 45 =
29. 29.75 × 36 =
30. 30.36 × 15 =
31. 31.28 × 15 =
32. 32.25 × 6 =
33. 33.35 × 26 =
34. 34.125 × 14 =
35. 35.14 × 35 =
36. 36.125 × 6 =
37. 37.18 × 55 =
38. 38.6 × 65 =
39. 39.75 × 20 =
40. 40.55 × 24 =

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