Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 177 · 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. 2.10 × 125 =
3. 3.10 × 75 =
4. 4.24 × 35 =
5. 5.36 × 55 =
6. 6.55 × 20 =
7. 7.15 × 32 =
8. 8.75 × 20 =
9. 9.25 × 6 =
10. 10.15 × 16 =
11. 11.32 × 125 =
12. 12.65 × 36 =
13. 13.32 × 65 =
14. 14.28 × 55 =
15. 15.24 × 15 =
16. 16.10 × 125 =
17. 17.6 × 15 =
18. 18.25 × 12 =
19. 19.55 × 6 =
20. 20.25 × 8 =
21. 21.34 × 25 =
22. 22.28 × 15 =
23. 23.38 × 55 =
24. 24.45 × 6 =
25. 25.65 × 36 =
26. 26.34 × 35 =
27. 27.24 × 75 =
28. 28.25 × 24 =
29. 29.34 × 45 =
30. 30.35 × 26 =
31. 31.15 × 12 =
32. 32.15 × 24 =
33. 33.38 × 75 =
34. 34.14 × 125 =
35. 35.125 × 28 =
36. 36.20 × 65 =
37. 37.16 × 65 =
38. 38.35 × 34 =
39. 39.8 × 75 =
40. 40.25 × 26 =

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