Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 55 · 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. 1.14 × 45 =
2. 2.30 × 55 =
3. 3.45 × 12 =
4. 4.38 × 55 =
5. 5.14 × 125 =
6. 6.25 × 6 =
7. 7.18 × 55 =
8. 8.65 × 6 =
9. 9.34 × 55 =
10. 10.125 × 14 =
11. 11.55 × 38 =
12. 12.14 × 45 =
13. 13.32 × 25 =
14. 14.30 × 125 =
15. 15.15 × 30 =
16. 16.55 × 6 =
17. 17.20 × 125 =
18. 18.65 × 34 =
19. 19.6 × 35 =
20. 20.20 × 25 =
21. 21.125 × 14 =
22. 22.22 × 75 =
23. 23.14 × 45 =
24. 24.75 × 40 =
25. 25.36 × 75 =
26. 26.55 × 14 =
27. 27.24 × 25 =
28. 28.55 × 8 =
29. 29.55 × 24 =
30. 30.18 × 35 =
31. 31.45 × 38 =
32. 32.75 × 6 =
33. 33.55 × 22 =
34. 34.32 × 55 =
35. 35.75 × 40 =
36. 36.25 × 14 =
37. 37.28 × 25 =
38. 38.55 × 12 =
39. 39.125 × 10 =
40. 40.15 × 40 =

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