Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 481 · 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. 1.12 × 45 =
2. 2.18 × 25 =
3. 3.25 × 16 =
4. 4.8 × 15 =
5. 5.45 × 14 =
6. 6.35 × 40 =
7. 7.18 × 35 =
8. 8.15 × 36 =
9. 9.75 × 28 =
10. 10.15 × 32 =
11. 11.32 × 65 =
12. 12.35 × 12 =
13. 13.55 × 24 =
14. 14.8 × 125 =
15. 15.55 × 26 =
16. 16.55 × 24 =
17. 17.15 × 8 =
18. 18.75 × 30 =
19. 19.25 × 24 =
20. 20.34 × 45 =
21. 21.12 × 75 =
22. 22.14 × 65 =
23. 23.55 × 30 =
24. 24.6 × 15 =
25. 25.25 × 32 =
26. 26.38 × 55 =
27. 27.28 × 15 =
28. 28.75 × 34 =
29. 29.25 × 28 =
30. 30.20 × 75 =
31. 31.16 × 35 =
32. 32.6 × 65 =
33. 33.38 × 65 =
34. 34.65 × 16 =
35. 35.45 × 16 =
36. 36.8 × 55 =
37. 37.14 × 35 =
38. 38.55 × 20 =
39. 39.125 × 32 =
40. 40.34 × 75 =

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