Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 185 · 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 × 8 =
2. 2.65 × 26 =
3. 3.75 × 24 =
4. 4.36 × 125 =
5. 5.40 × 55 =
6. 6.65 × 10 =
7. 7.15 × 8 =
8. 8.55 × 26 =
9. 9.65 × 38 =
10. 10.12 × 65 =
11. 11.28 × 75 =
12. 12.65 × 24 =
13. 13.8 × 45 =
14. 14.45 × 10 =
15. 15.14 × 25 =
16. 16.25 × 30 =
17. 17.28 × 35 =
18. 18.24 × 125 =
19. 19.10 × 35 =
20. 20.40 × 35 =
21. 21.55 × 18 =
22. 22.18 × 65 =
23. 23.36 × 25 =
24. 24.125 × 38 =
25. 25.15 × 38 =
26. 26.16 × 65 =
27. 27.35 × 20 =
28. 28.35 × 20 =
29. 29.18 × 55 =
30. 30.40 × 25 =
31. 31.55 × 8 =
32. 32.125 × 6 =
33. 33.30 × 15 =
34. 34.24 × 125 =
35. 35.24 × 15 =
36. 36.45 × 18 =
37. 37.8 × 45 =
38. 38.65 × 12 =
39. 39.28 × 65 =
40. 40.32 × 15 =

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