Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 168 · 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. 1.55 × 6 =
2. 2.34 × 15 =
3. 3.10 × 55 =
4. 4.22 × 15 =
5. 5.10 × 125 =
6. 6.75 × 18 =
7. 7.16 × 65 =
8. 8.65 × 24 =
9. 9.36 × 15 =
10. 10.34 × 125 =
11. 11.14 × 25 =
12. 12.36 × 75 =
13. 13.20 × 75 =
14. 14.55 × 38 =
15. 15.45 × 28 =
16. 16.18 × 75 =
17. 17.25 × 30 =
18. 18.36 × 35 =
19. 19.15 × 32 =
20. 20.15 × 10 =
21. 21.75 × 22 =
22. 22.8 × 65 =
23. 23.15 × 40 =
24. 24.24 × 35 =
25. 25.25 × 22 =
26. 26.38 × 125 =
27. 27.55 × 6 =
28. 28.25 × 14 =
29. 29.15 × 20 =
30. 30.12 × 45 =
31. 31.32 × 75 =
32. 32.55 × 34 =
33. 33.55 × 30 =
34. 34.40 × 55 =
35. 35.36 × 45 =
36. 36.45 × 26 =
37. 37.24 × 25 =
38. 38.16 × 45 =
39. 39.65 × 28 =
40. 40.25 × 38 =

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