Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 386 · 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. 1.45 × 10 =
2. 2.55 × 8 =
3. 3.26 × 125 =
4. 4.35 × 28 =
5. 5.8 × 35 =
6. 6.25 × 8 =
7. 7.18 × 15 =
8. 8.22 × 25 =
9. 9.24 × 55 =
10. 10.24 × 55 =
11. 11.12 × 35 =
12. 12.125 × 36 =
13. 13.38 × 15 =
14. 14.25 × 18 =
15. 15.16 × 45 =
16. 16.36 × 75 =
17. 17.40 × 65 =
18. 18.75 × 10 =
19. 19.55 × 6 =
20. 20.55 × 38 =
21. 21.65 × 40 =
22. 22.25 × 34 =
23. 23.16 × 65 =
24. 24.55 × 40 =
25. 25.125 × 28 =
26. 26.35 × 6 =
27. 27.14 × 55 =
28. 28.12 × 65 =
29. 29.15 × 30 =
30. 30.10 × 65 =
31. 31.15 × 24 =
32. 32.25 × 12 =
33. 33.12 × 15 =
34. 34.15 × 10 =
35. 35.22 × 25 =
36. 36.55 × 38 =
37. 37.26 × 35 =
38. 38.25 × 14 =
39. 39.34 × 45 =
40. 40.35 × 28 =

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