Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 789 · 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. 1.24 × 55 =
2. 2.15 × 8 =
3. 3.15 × 40 =
4. 4.55 × 14 =
5. 5.15 × 26 =
6. 6.16 × 75 =
7. 7.20 × 25 =
8. 8.15 × 26 =
9. 9.12 × 75 =
10. 10.125 × 22 =
11. 11.8 × 125 =
12. 12.18 × 45 =
13. 13.125 × 22 =
14. 14.6 × 45 =
15. 15.28 × 35 =
16. 16.75 × 18 =
17. 17.35 × 8 =
18. 18.25 × 14 =
19. 19.18 × 55 =
20. 20.12 × 75 =
21. 21.75 × 22 =
22. 22.36 × 125 =
23. 23.40 × 45 =
24. 24.45 × 40 =
25. 25.22 × 55 =
26. 26.65 × 34 =
27. 27.25 × 22 =
28. 28.45 × 6 =
29. 29.30 × 45 =
30. 30.35 × 6 =
31. 31.24 × 35 =
32. 32.55 × 34 =
33. 33.6 × 15 =
34. 34.55 × 40 =
35. 35.40 × 45 =
36. 36.25 × 18 =
37. 37.55 × 38 =
38. 38.125 × 28 =
39. 39.20 × 45 =
40. 40.40 × 55 =

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