Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 848 · 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 × 25 =
2. 2.55 × 12 =
3. 3.24 × 15 =
4. 4.38 × 75 =
5. 5.45 × 24 =
6. 6.35 × 10 =
7. 7.38 × 75 =
8. 8.65 × 18 =
9. 9.35 × 30 =
10. 10.24 × 25 =
11. 11.15 × 10 =
12. 12.26 × 25 =
13. 13.18 × 35 =
14. 14.75 × 10 =
15. 15.28 × 15 =
16. 16.20 × 75 =
17. 17.35 × 16 =
18. 18.32 × 55 =
19. 19.26 × 125 =
20. 20.125 × 18 =
21. 21.55 × 16 =
22. 22.30 × 55 =
23. 23.55 × 6 =
24. 24.18 × 125 =
25. 25.34 × 75 =
26. 26.15 × 8 =
27. 27.22 × 45 =
28. 28.8 × 25 =
29. 29.10 × 35 =
30. 30.45 × 20 =
31. 31.18 × 125 =
32. 32.25 × 14 =
33. 33.65 × 20 =
34. 34.55 × 40 =
35. 35.65 × 16 =
36. 36.15 × 28 =
37. 37.32 × 55 =
38. 38.36 × 45 =
39. 39.34 × 55 =
40. 40.25 × 22 =

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