Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 122 · 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. 1.36 × 75 =
2. 2.25 × 12 =
3. 3.75 × 6 =
4. 4.36 × 55 =
5. 5.8 × 125 =
6. 6.40 × 55 =
7. 7.35 × 12 =
8. 8.65 × 22 =
9. 9.8 × 55 =
10. 10.16 × 55 =
11. 11.32 × 35 =
12. 12.55 × 24 =
13. 13.55 × 12 =
14. 14.14 × 35 =
15. 15.12 × 35 =
16. 16.6 × 35 =
17. 17.75 × 22 =
18. 18.25 × 26 =
19. 19.15 × 30 =
20. 20.35 × 14 =
21. 21.6 × 65 =
22. 22.75 × 16 =
23. 23.55 × 14 =
24. 24.65 × 40 =
25. 25.8 × 65 =
26. 26.36 × 55 =
27. 27.40 × 55 =
28. 28.8 × 65 =
29. 29.45 × 22 =
30. 30.15 × 40 =
31. 31.36 × 65 =
32. 32.55 × 32 =
33. 33.36 × 75 =
34. 34.55 × 30 =
35. 35.10 × 15 =
36. 36.45 × 36 =
37. 37.65 × 28 =
38. 38.55 × 10 =
39. 39.16 × 45 =
40. 40.25 × 6 =

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