Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 559 · 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. 1.6 × 75 =
2. 2.45 × 20 =
3. 3.15 × 8 =
4. 4.15 × 18 =
5. 5.45 × 34 =
6. 6.75 × 24 =
7. 7.20 × 55 =
8. 8.55 × 26 =
9. 9.45 × 8 =
10. 10.12 × 35 =
11. 11.125 × 6 =
12. 12.55 × 38 =
13. 13.125 × 14 =
14. 14.12 × 75 =
15. 15.25 × 8 =
16. 16.45 × 6 =
17. 17.65 × 40 =
18. 18.75 × 36 =
19. 19.22 × 75 =
20. 20.28 × 25 =
21. 21.65 × 8 =
22. 22.75 × 10 =
23. 23.36 × 65 =
24. 24.65 × 30 =
25. 25.75 × 14 =
26. 26.55 × 28 =
27. 27.25 × 14 =
28. 28.75 × 34 =
29. 29.22 × 25 =
30. 30.25 × 22 =
31. 31.30 × 25 =
32. 32.15 × 8 =
33. 33.38 × 15 =
34. 34.14 × 35 =
35. 35.8 × 65 =
36. 36.12 × 45 =
37. 37.30 × 45 =
38. 38.24 × 45 =
39. 39.24 × 25 =
40. 40.35 × 12 =

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