Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 312 · 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. 1.45 × 12 =
2. 2.20 × 125 =
3. 3.45 × 34 =
4. 4.18 × 65 =
5. 5.18 × 45 =
6. 6.25 × 38 =
7. 7.65 × 14 =
8. 8.16 × 15 =
9. 9.28 × 125 =
10. 10.18 × 55 =
11. 11.32 × 35 =
12. 12.38 × 75 =
13. 13.45 × 36 =
14. 14.75 × 28 =
15. 15.34 × 45 =
16. 16.6 × 15 =
17. 17.75 × 28 =
18. 18.75 × 10 =
19. 19.16 × 125 =
20. 20.35 × 36 =
21. 21.20 × 45 =
22. 22.35 × 8 =
23. 23.6 × 45 =
24. 24.55 × 24 =
25. 25.35 × 26 =
26. 26.75 × 30 =
27. 27.25 × 10 =
28. 28.65 × 14 =
29. 29.65 × 8 =
30. 30.45 × 16 =
31. 31.125 × 6 =
32. 32.125 × 36 =
33. 33.55 × 14 =
34. 34.38 × 65 =
35. 35.40 × 45 =
36. 36.35 × 34 =
37. 37.65 × 14 =
38. 38.45 × 20 =
39. 39.15 × 32 =
40. 40.65 × 38 =

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