Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 446 · 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. 1.18 × 25 =
2. 2.55 × 12 =
3. 3.24 × 35 =
4. 4.65 × 20 =
5. 5.15 × 28 =
6. 6.35 × 24 =
7. 7.14 × 25 =
8. 8.14 × 65 =
9. 9.75 × 34 =
10. 10.15 × 10 =
11. 11.15 × 6 =
12. 12.55 × 14 =
13. 13.25 × 40 =
14. 14.10 × 65 =
15. 15.34 × 45 =
16. 16.125 × 32 =
17. 17.40 × 65 =
18. 18.25 × 28 =
19. 19.35 × 22 =
20. 20.35 × 10 =
21. 21.45 × 12 =
22. 22.15 × 14 =
23. 23.24 × 45 =
24. 24.15 × 36 =
25. 25.75 × 10 =
26. 26.35 × 16 =
27. 27.22 × 55 =
28. 28.22 × 25 =
29. 29.45 × 28 =
30. 30.45 × 26 =
31. 31.125 × 38 =
32. 32.65 × 14 =
33. 33.10 × 65 =
34. 34.65 × 24 =
35. 35.75 × 18 =
36. 36.45 × 14 =
37. 37.65 × 16 =
38. 38.65 × 14 =
39. 39.20 × 35 =
40. 40.55 × 20 =

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