Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 296 · 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. 1.38 × 65 =
2. 2.25 × 20 =
3. 3.15 × 24 =
4. 4.25 × 30 =
5. 5.75 × 36 =
6. 6.125 × 24 =
7. 7.6 × 25 =
8. 8.65 × 34 =
9. 9.35 × 8 =
10. 10.32 × 55 =
11. 11.16 × 125 =
12. 12.55 × 28 =
13. 13.25 × 10 =
14. 14.12 × 55 =
15. 15.35 × 8 =
16. 16.24 × 35 =
17. 17.25 × 10 =
18. 18.75 × 34 =
19. 19.36 × 15 =
20. 20.10 × 65 =
21. 21.22 × 125 =
22. 22.14 × 125 =
23. 23.10 × 15 =
24. 24.25 × 14 =
25. 25.24 × 75 =
26. 26.22 × 45 =
27. 27.25 × 40 =
28. 28.15 × 34 =
29. 29.28 × 35 =
30. 30.16 × 65 =
31. 31.15 × 20 =
32. 32.65 × 28 =
33. 33.40 × 25 =
34. 34.25 × 24 =
35. 35.25 × 20 =
36. 36.45 × 24 =
37. 37.15 × 28 =
38. 38.30 × 125 =
39. 39.25 × 6 =
40. 40.24 × 45 =

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