Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 902 · 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. 1.75 × 24 =
2. 2.75 × 10 =
3. 3.10 × 75 =
4. 4.75 × 24 =
5. 5.25 × 40 =
6. 6.22 × 125 =
7. 7.25 × 32 =
8. 8.125 × 8 =
9. 9.55 × 14 =
10. 10.65 × 20 =
11. 11.38 × 45 =
12. 12.15 × 6 =
13. 13.65 × 32 =
14. 14.18 × 75 =
15. 15.32 × 125 =
16. 16.28 × 65 =
17. 17.15 × 18 =
18. 18.10 × 25 =
19. 19.55 × 36 =
20. 20.55 × 30 =
21. 21.22 × 15 =
22. 22.55 × 14 =
23. 23.25 × 14 =
24. 24.75 × 36 =
25. 25.18 × 75 =
26. 26.25 × 8 =
27. 27.25 × 32 =
28. 28.45 × 38 =
29. 29.34 × 15 =
30. 30.34 × 35 =
31. 31.35 × 18 =
32. 32.75 × 24 =
33. 33.45 × 40 =
34. 34.15 × 12 =
35. 35.36 × 55 =
36. 36.36 × 55 =
37. 37.12 × 75 =
38. 38.10 × 25 =
39. 39.8 × 75 =
40. 40.65 × 32 =

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