Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 356 · 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. 1.18 × 55 =
2. 2.28 × 75 =
3. 3.25 × 32 =
4. 4.24 × 65 =
5. 5.12 × 15 =
6. 6.65 × 10 =
7. 7.40 × 55 =
8. 8.24 × 65 =
9. 9.15 × 34 =
10. 10.6 × 35 =
11. 11.16 × 15 =
12. 12.38 × 55 =
13. 13.40 × 35 =
14. 14.32 × 15 =
15. 15.26 × 45 =
16. 16.45 × 10 =
17. 17.45 × 26 =
18. 18.25 × 18 =
19. 19.6 × 125 =
20. 20.15 × 16 =
21. 21.55 × 14 =
22. 22.14 × 45 =
23. 23.45 × 10 =
24. 24.125 × 20 =
25. 25.15 × 22 =
26. 26.15 × 34 =
27. 27.75 × 16 =
28. 28.8 × 15 =
29. 29.38 × 125 =
30. 30.36 × 15 =
31. 31.40 × 75 =
32. 32.30 × 25 =
33. 33.15 × 18 =
34. 34.14 × 15 =
35. 35.75 × 10 =
36. 36.65 × 10 =
37. 37.35 × 30 =
38. 38.16 × 75 =
39. 39.55 × 24 =
40. 40.65 × 30 =

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