Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 804 · 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. 2.24 × 45 =
3. 3.75 × 10 =
4. 4.34 × 75 =
5. 5.75 × 14 =
6. 6.55 × 20 =
7. 7.14 × 25 =
8. 8.45 × 32 =
9. 9.14 × 125 =
10. 10.65 × 28 =
11. 11.30 × 75 =
12. 12.55 × 22 =
13. 13.18 × 125 =
14. 14.8 × 15 =
15. 15.28 × 55 =
16. 16.28 × 25 =
17. 17.65 × 10 =
18. 18.25 × 38 =
19. 19.25 × 14 =
20. 20.125 × 12 =
21. 21.32 × 65 =
22. 22.14 × 75 =
23. 23.22 × 55 =
24. 24.25 × 22 =
25. 25.14 × 75 =
26. 26.35 × 12 =
27. 27.8 × 45 =
28. 28.8 × 35 =
29. 29.22 × 65 =
30. 30.15 × 36 =
31. 31.55 × 6 =
32. 32.15 × 18 =
33. 33.32 × 125 =
34. 34.26 × 25 =
35. 35.65 × 10 =
36. 36.28 × 35 =
37. 37.35 × 10 =
38. 38.36 × 35 =
39. 39.45 × 38 =
40. 40.45 × 40 =

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