Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 90 · 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 × 65 =
2. 2.55 × 12 =
3. 3.12 × 125 =
4. 4.125 × 8 =
5. 5.15 × 24 =
6. 6.15 × 18 =
7. 7.28 × 75 =
8. 8.6 × 125 =
9. 9.15 × 22 =
10. 10.14 × 65 =
11. 11.55 × 38 =
12. 12.75 × 32 =
13. 13.30 × 75 =
14. 14.28 × 25 =
15. 15.8 × 25 =
16. 16.18 × 125 =
17. 17.6 × 75 =
18. 18.125 × 30 =
19. 19.22 × 35 =
20. 20.45 × 16 =
21. 21.6 × 35 =
22. 22.35 × 22 =
23. 23.22 × 65 =
24. 24.40 × 25 =
25. 25.15 × 28 =
26. 26.45 × 24 =
27. 27.12 × 35 =
28. 28.65 × 6 =
29. 29.10 × 55 =
30. 30.125 × 28 =
31. 31.15 × 14 =
32. 32.38 × 15 =
33. 33.22 × 125 =
34. 34.125 × 22 =
35. 35.6 × 55 =
36. 36.14 × 75 =
37. 37.24 × 75 =
38. 38.28 × 125 =
39. 39.25 × 24 =
40. 40.45 × 6 =

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