Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 845 · 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 × 6 =
2. 2.40 × 125 =
3. 3.6 × 65 =
4. 4.45 × 6 =
5. 5.30 × 25 =
6. 6.28 × 15 =
7. 7.16 × 25 =
8. 8.28 × 25 =
9. 9.36 × 55 =
10. 10.75 × 36 =
11. 11.15 × 28 =
12. 12.75 × 34 =
13. 13.15 × 12 =
14. 14.8 × 25 =
15. 15.16 × 45 =
16. 16.45 × 34 =
17. 17.36 × 45 =
18. 18.10 × 125 =
19. 19.35 × 32 =
20. 20.16 × 35 =
21. 21.18 × 55 =
22. 22.35 × 6 =
23. 23.34 × 25 =
24. 24.12 × 125 =
25. 25.35 × 10 =
26. 26.55 × 40 =
27. 27.24 × 125 =
28. 28.45 × 30 =
29. 29.22 × 25 =
30. 30.25 × 20 =
31. 31.18 × 65 =
32. 32.125 × 40 =
33. 33.8 × 125 =
34. 34.18 × 15 =
35. 35.35 × 20 =
36. 36.18 × 15 =
37. 37.38 × 25 =
38. 38.38 × 15 =
39. 39.25 × 36 =
40. 40.65 × 8 =

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