Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 782 · 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. 1.65 × 14 =
2. 2.10 × 25 =
3. 3.6 × 15 =
4. 4.65 × 24 =
5. 5.10 × 75 =
6. 6.35 × 16 =
7. 7.6 × 55 =
8. 8.75 × 38 =
9. 9.20 × 15 =
10. 10.10 × 55 =
11. 11.55 × 6 =
12. 12.8 × 15 =
13. 13.16 × 15 =
14. 14.25 × 24 =
15. 15.15 × 36 =
16. 16.6 × 125 =
17. 17.25 × 14 =
18. 18.65 × 28 =
19. 19.55 × 22 =
20. 20.25 × 22 =
21. 21.35 × 6 =
22. 22.125 × 20 =
23. 23.38 × 65 =
24. 24.30 × 125 =
25. 25.35 × 36 =
26. 26.55 × 28 =
27. 27.45 × 8 =
28. 28.55 × 6 =
29. 29.22 × 35 =
30. 30.8 × 55 =
31. 31.25 × 40 =
32. 32.18 × 45 =
33. 33.36 × 35 =
34. 34.55 × 6 =
35. 35.15 × 22 =
36. 36.25 × 14 =
37. 37.40 × 25 =
38. 38.55 × 22 =
39. 39.125 × 24 =
40. 40.35 × 16 =

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