Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 4 · 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 × 18 =
2. 2.8 × 25 =
3. 3.75 × 14 =
4. 4.15 × 6 =
5. 5.15 × 12 =
6. 6.8 × 45 =
7. 7.55 × 18 =
8. 8.8 × 55 =
9. 9.16 × 35 =
10. 10.45 × 8 =
11. 11.35 × 18 =
12. 12.26 × 65 =
13. 13.38 × 55 =
14. 14.55 × 14 =
15. 15.40 × 75 =
16. 16.75 × 36 =
17. 17.12 × 65 =
18. 18.32 × 75 =
19. 19.45 × 16 =
20. 20.22 × 15 =
21. 21.25 × 36 =
22. 22.16 × 25 =
23. 23.30 × 15 =
24. 24.45 × 20 =
25. 25.75 × 20 =
26. 26.38 × 45 =
27. 27.30 × 55 =
28. 28.38 × 55 =
29. 29.55 × 14 =
30. 30.10 × 125 =
31. 31.25 × 18 =
32. 32.15 × 20 =
33. 33.25 × 30 =
34. 34.75 × 12 =
35. 35.75 × 26 =
36. 36.6 × 55 =
37. 37.8 × 15 =
38. 38.30 × 65 =
39. 39.15 × 8 =
40. 40.45 × 40 =

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