Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 479 · 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. 1.15 × 22 =
2. 2.75 × 20 =
3. 3.40 × 45 =
4. 4.8 × 55 =
5. 5.15 × 30 =
6. 6.30 × 15 =
7. 7.45 × 30 =
8. 8.30 × 75 =
9. 9.75 × 28 =
10. 10.24 × 65 =
11. 11.125 × 12 =
12. 12.24 × 15 =
13. 13.22 × 35 =
14. 14.20 × 55 =
15. 15.40 × 65 =
16. 16.25 × 34 =
17. 17.12 × 15 =
18. 18.45 × 40 =
19. 19.15 × 20 =
20. 20.75 × 32 =
21. 21.24 × 125 =
22. 22.22 × 25 =
23. 23.65 × 22 =
24. 24.15 × 16 =
25. 25.38 × 25 =
26. 26.38 × 15 =
27. 27.15 × 26 =
28. 28.32 × 45 =
29. 29.55 × 12 =
30. 30.38 × 75 =
31. 31.25 × 32 =
32. 32.75 × 6 =
33. 33.6 × 35 =
34. 34.35 × 40 =
35. 35.75 × 40 =
36. 36.25 × 38 =
37. 37.24 × 25 =
38. 38.12 × 25 =
39. 39.25 × 12 =
40. 40.75 × 8 =

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