Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 367 · 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. 1.20 × 75 =
2. 2.15 × 10 =
3. 3.36 × 75 =
4. 4.125 × 18 =
5. 5.125 × 6 =
6. 6.28 × 35 =
7. 7.22 × 65 =
8. 8.35 × 28 =
9. 9.15 × 12 =
10. 10.8 × 15 =
11. 11.45 × 38 =
12. 12.75 × 8 =
13. 13.25 × 16 =
14. 14.75 × 28 =
15. 15.25 × 32 =
16. 16.65 × 10 =
17. 17.22 × 65 =
18. 18.36 × 15 =
19. 19.45 × 34 =
20. 20.18 × 45 =
21. 21.15 × 32 =
22. 22.35 × 30 =
23. 23.8 × 55 =
24. 24.8 × 25 =
25. 25.16 × 75 =
26. 26.6 × 35 =
27. 27.8 × 15 =
28. 28.15 × 12 =
29. 29.25 × 30 =
30. 30.10 × 15 =
31. 31.75 × 26 =
32. 32.45 × 14 =
33. 33.34 × 25 =
34. 34.55 × 24 =
35. 35.15 × 22 =
36. 36.15 × 8 =
37. 37.32 × 45 =
38. 38.15 × 32 =
39. 39.24 × 25 =
40. 40.25 × 28 =

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