Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 196 · 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. 1.22 × 25 =
2. 2.28 × 65 =
3. 3.55 × 6 =
4. 4.10 × 125 =
5. 5.15 × 14 =
6. 6.25 × 40 =
7. 7.65 × 8 =
8. 8.25 × 14 =
9. 9.35 × 16 =
10. 10.30 × 55 =
11. 11.34 × 15 =
12. 12.125 × 18 =
13. 13.35 × 40 =
14. 14.75 × 38 =
15. 15.18 × 25 =
16. 16.45 × 16 =
17. 17.6 × 45 =
18. 18.65 × 28 =
19. 19.28 × 65 =
20. 20.25 × 38 =
21. 21.75 × 8 =
22. 22.25 × 24 =
23. 23.75 × 14 =
24. 24.24 × 75 =
25. 25.35 × 6 =
26. 26.34 × 25 =
27. 27.30 × 55 =
28. 28.125 × 40 =
29. 29.25 × 14 =
30. 30.32 × 125 =
31. 31.20 × 25 =
32. 32.15 × 32 =
33. 33.20 × 45 =
34. 34.75 × 28 =
35. 35.35 × 12 =
36. 36.35 × 36 =
37. 37.45 × 36 =
38. 38.35 × 34 =
39. 39.22 × 55 =
40. 40.45 × 10 =

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