Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 103 · 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. 1.25 × 32 =
2. 2.65 × 30 =
3. 3.55 × 22 =
4. 4.75 × 14 =
5. 5.8 × 25 =
6. 6.75 × 12 =
7. 7.55 × 20 =
8. 8.34 × 35 =
9. 9.55 × 26 =
10. 10.14 × 55 =
11. 11.36 × 65 =
12. 12.28 × 35 =
13. 13.26 × 15 =
14. 14.16 × 55 =
15. 15.65 × 14 =
16. 16.16 × 65 =
17. 17.40 × 55 =
18. 18.26 × 25 =
19. 19.24 × 25 =
20. 20.34 × 75 =
21. 21.32 × 45 =
22. 22.16 × 65 =
23. 23.24 × 125 =
24. 24.10 × 25 =
25. 25.24 × 65 =
26. 26.45 × 32 =
27. 27.35 × 8 =
28. 28.65 × 36 =
29. 29.45 × 24 =
30. 30.22 × 25 =
31. 31.25 × 6 =
32. 32.20 × 65 =
33. 33.45 × 12 =
34. 34.15 × 32 =
35. 35.32 × 15 =
36. 36.45 × 40 =
37. 37.14 × 45 =
38. 38.35 × 6 =
39. 39.38 × 55 =
40. 40.10 × 15 =

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