Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 207 · 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. 1.22 × 75 =
2. 2.25 × 38 =
3. 3.16 × 15 =
4. 4.12 × 25 =
5. 5.8 × 55 =
6. 6.26 × 65 =
7. 7.16 × 35 =
8. 8.65 × 30 =
9. 9.65 × 34 =
10. 10.15 × 10 =
11. 11.45 × 20 =
12. 12.6 × 15 =
13. 13.45 × 8 =
14. 14.30 × 65 =
15. 15.75 × 6 =
16. 16.35 × 18 =
17. 17.20 × 75 =
18. 18.10 × 125 =
19. 19.15 × 36 =
20. 20.20 × 65 =
21. 21.40 × 35 =
22. 22.25 × 38 =
23. 23.10 × 25 =
24. 24.16 × 35 =
25. 25.55 × 36 =
26. 26.26 × 55 =
27. 27.24 × 65 =
28. 28.15 × 26 =
29. 29.75 × 20 =
30. 30.15 × 10 =
31. 31.35 × 6 =
32. 32.28 × 35 =
33. 33.14 × 125 =
34. 34.6 × 45 =
35. 35.15 × 8 =
36. 36.15 × 32 =
37. 37.40 × 45 =
38. 38.6 × 125 =
39. 39.40 × 45 =
40. 40.22 × 45 =

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