Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 871 · 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 × 10 =
2. 2.25 × 38 =
3. 3.20 × 45 =
4. 4.26 × 55 =
5. 5.125 × 22 =
6. 6.45 × 18 =
7. 7.34 × 65 =
8. 8.6 × 65 =
9. 9.15 × 38 =
10. 10.15 × 28 =
11. 11.20 × 25 =
12. 12.10 × 125 =
13. 13.14 × 35 =
14. 14.12 × 55 =
15. 15.18 × 35 =
16. 16.55 × 14 =
17. 17.75 × 14 =
18. 18.35 × 24 =
19. 19.75 × 28 =
20. 20.75 × 26 =
21. 21.36 × 25 =
22. 22.34 × 65 =
23. 23.35 × 36 =
24. 24.24 × 65 =
25. 25.45 × 22 =
26. 26.25 × 12 =
27. 27.125 × 36 =
28. 28.20 × 25 =
29. 29.15 × 6 =
30. 30.22 × 35 =
31. 31.35 × 22 =
32. 32.8 × 75 =
33. 33.15 × 26 =
34. 34.125 × 40 =
35. 35.65 × 14 =
36. 36.55 × 12 =
37. 37.34 × 55 =
38. 38.55 × 30 =
39. 39.22 × 15 =
40. 40.28 × 75 =

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