Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 867 · 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. 1.38 × 25 =
2. 2.65 × 36 =
3. 3.75 × 32 =
4. 4.16 × 25 =
5. 5.15 × 8 =
6. 6.55 × 12 =
7. 7.20 × 125 =
8. 8.38 × 55 =
9. 9.25 × 32 =
10. 10.6 × 35 =
11. 11.38 × 65 =
12. 12.10 × 55 =
13. 13.55 × 18 =
14. 14.26 × 25 =
15. 15.8 × 35 =
16. 16.25 × 26 =
17. 17.35 × 26 =
18. 18.25 × 12 =
19. 19.22 × 65 =
20. 20.15 × 16 =
21. 21.25 × 26 =
22. 22.45 × 30 =
23. 23.25 × 20 =
24. 24.20 × 45 =
25. 25.125 × 32 =
26. 26.26 × 15 =
27. 27.55 × 16 =
28. 28.15 × 38 =
29. 29.35 × 26 =
30. 30.35 × 10 =
31. 31.55 × 32 =
32. 32.75 × 10 =
33. 33.8 × 35 =
34. 34.75 × 26 =
35. 35.32 × 45 =
36. 36.12 × 35 =
37. 37.24 × 125 =
38. 38.125 × 28 =
39. 39.18 × 55 =
40. 40.16 × 25 =

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