Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 152 · 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. 1.65 × 30 =
2. 2.65 × 26 =
3. 3.8 × 35 =
4. 4.12 × 25 =
5. 5.25 × 30 =
6. 6.10 × 55 =
7. 7.15 × 12 =
8. 8.32 × 55 =
9. 9.45 × 18 =
10. 10.25 × 12 =
11. 11.55 × 28 =
12. 12.65 × 14 =
13. 13.15 × 6 =
14. 14.65 × 26 =
15. 15.40 × 65 =
16. 16.14 × 45 =
17. 17.25 × 30 =
18. 18.36 × 75 =
19. 19.18 × 25 =
20. 20.25 × 12 =
21. 21.10 × 15 =
22. 22.6 × 35 =
23. 23.14 × 35 =
24. 24.55 × 22 =
25. 25.20 × 65 =
26. 26.16 × 125 =
27. 27.6 × 45 =
28. 28.15 × 34 =
29. 29.15 × 24 =
30. 30.15 × 40 =
31. 31.35 × 14 =
32. 32.45 × 30 =
33. 33.35 × 8 =
34. 34.125 × 12 =
35. 35.45 × 26 =
36. 36.40 × 35 =
37. 37.65 × 32 =
38. 38.55 × 10 =
39. 39.75 × 24 =
40. 40.35 × 8 =

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