Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 669 · 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. 1.45 × 12 =
2. 2.24 × 55 =
3. 3.16 × 15 =
4. 4.125 × 14 =
5. 5.24 × 55 =
6. 6.25 × 36 =
7. 7.35 × 10 =
8. 8.15 × 18 =
9. 9.25 × 34 =
10. 10.15 × 34 =
11. 11.12 × 65 =
12. 12.25 × 24 =
13. 13.125 × 12 =
14. 14.35 × 12 =
15. 15.18 × 45 =
16. 16.12 × 65 =
17. 17.35 × 6 =
18. 18.38 × 15 =
19. 19.28 × 125 =
20. 20.8 × 75 =
21. 21.45 × 24 =
22. 22.28 × 65 =
23. 23.26 × 15 =
24. 24.12 × 65 =
25. 25.75 × 26 =
26. 26.45 × 28 =
27. 27.20 × 15 =
28. 28.24 × 125 =
29. 29.12 × 75 =
30. 30.35 × 30 =
31. 31.10 × 55 =
32. 32.65 × 30 =
33. 33.125 × 12 =
34. 34.22 × 65 =
35. 35.38 × 45 =
36. 36.24 × 45 =
37. 37.125 × 18 =
38. 38.25 × 16 =
39. 39.10 × 15 =
40. 40.15 × 8 =

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