Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 199 · 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. 1.10 × 75 =
2. 2.16 × 15 =
3. 3.12 × 35 =
4. 4.16 × 35 =
5. 5.24 × 25 =
6. 6.24 × 75 =
7. 7.45 × 30 =
8. 8.16 × 125 =
9. 9.65 × 30 =
10. 10.24 × 125 =
11. 11.125 × 38 =
12. 12.25 × 22 =
13. 13.34 × 35 =
14. 14.10 × 75 =
15. 15.10 × 125 =
16. 16.15 × 24 =
17. 17.15 × 14 =
18. 18.45 × 18 =
19. 19.22 × 45 =
20. 20.18 × 65 =
21. 21.14 × 15 =
22. 22.25 × 6 =
23. 23.35 × 8 =
24. 24.15 × 22 =
25. 25.45 × 12 =
26. 26.25 × 20 =
27. 27.25 × 30 =
28. 28.55 × 6 =
29. 29.24 × 65 =
30. 30.65 × 34 =
31. 31.25 × 22 =
32. 32.20 × 45 =
33. 33.65 × 22 =
34. 34.32 × 65 =
35. 35.125 × 18 =
36. 36.55 × 8 =
37. 37.38 × 75 =
38. 38.28 × 65 =
39. 39.26 × 125 =
40. 40.15 × 14 =

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