Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 127 · 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 × 20 =
2. 2.55 × 8 =
3. 3.24 × 15 =
4. 4.32 × 25 =
5. 5.34 × 75 =
6. 6.18 × 25 =
7. 7.8 × 45 =
8. 8.65 × 36 =
9. 9.125 × 36 =
10. 10.32 × 75 =
11. 11.26 × 75 =
12. 12.18 × 55 =
13. 13.6 × 55 =
14. 14.36 × 25 =
15. 15.14 × 15 =
16. 16.45 × 26 =
17. 17.75 × 8 =
18. 18.35 × 24 =
19. 19.8 × 65 =
20. 20.65 × 8 =
21. 21.32 × 65 =
22. 22.55 × 12 =
23. 23.8 × 125 =
24. 24.55 × 6 =
25. 25.34 × 55 =
26. 26.16 × 15 =
27. 27.65 × 18 =
28. 28.24 × 75 =
29. 29.55 × 38 =
30. 30.55 × 24 =
31. 31.12 × 75 =
32. 32.65 × 22 =
33. 33.12 × 65 =
34. 34.45 × 10 =
35. 35.25 × 40 =
36. 36.32 × 45 =
37. 37.20 × 65 =
38. 38.14 × 65 =
39. 39.14 × 35 =
40. 40.15 × 18 =

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