Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 487 · 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 × 36 =
2. 2.22 × 125 =
3. 3.6 × 55 =
4. 4.25 × 18 =
5. 5.20 × 25 =
6. 6.35 × 28 =
7. 7.75 × 24 =
8. 8.10 × 25 =
9. 9.18 × 55 =
10. 10.75 × 24 =
11. 11.8 × 35 =
12. 12.75 × 6 =
13. 13.125 × 26 =
14. 14.125 × 22 =
15. 15.36 × 15 =
16. 16.28 × 55 =
17. 17.25 × 10 =
18. 18.38 × 15 =
19. 19.35 × 40 =
20. 20.30 × 55 =
21. 21.34 × 125 =
22. 22.38 × 125 =
23. 23.6 × 15 =
24. 24.125 × 6 =
25. 25.16 × 75 =
26. 26.55 × 22 =
27. 27.125 × 14 =
28. 28.25 × 26 =
29. 29.34 × 65 =
30. 30.24 × 65 =
31. 31.12 × 125 =
32. 32.8 × 25 =
33. 33.28 × 125 =
34. 34.125 × 10 =
35. 35.35 × 6 =
36. 36.6 × 45 =
37. 37.55 × 22 =
38. 38.45 × 10 =
39. 39.6 × 55 =
40. 40.8 × 45 =

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