Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 547 · 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. 1.125 × 14 =
2. 2.22 × 45 =
3. 3.125 × 16 =
4. 4.18 × 35 =
5. 5.18 × 65 =
6. 6.24 × 15 =
7. 7.65 × 30 =
8. 8.40 × 45 =
9. 9.15 × 38 =
10. 10.26 × 25 =
11. 11.14 × 15 =
12. 12.40 × 25 =
13. 13.12 × 25 =
14. 14.25 × 38 =
15. 15.16 × 75 =
16. 16.25 × 36 =
17. 17.125 × 20 =
18. 18.28 × 125 =
19. 19.10 × 75 =
20. 20.75 × 20 =
21. 21.35 × 30 =
22. 22.65 × 24 =
23. 23.45 × 16 =
24. 24.125 × 28 =
25. 25.32 × 45 =
26. 26.32 × 35 =
27. 27.20 × 65 =
28. 28.20 × 25 =
29. 29.14 × 15 =
30. 30.15 × 20 =
31. 31.45 × 14 =
32. 32.125 × 22 =
33. 33.55 × 10 =
34. 34.75 × 20 =
35. 35.65 × 30 =
36. 36.125 × 36 =
37. 37.6 × 125 =
38. 38.65 × 22 =
39. 39.45 × 38 =
40. 40.20 × 25 =

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