Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 210 · 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. 1.45 × 36 =
2. 2.24 × 15 =
3. 3.16 × 25 =
4. 4.25 × 28 =
5. 5.125 × 32 =
6. 6.55 × 10 =
7. 7.16 × 25 =
8. 8.6 × 125 =
9. 9.8 × 15 =
10. 10.8 × 25 =
11. 11.30 × 25 =
12. 12.55 × 6 =
13. 13.75 × 6 =
14. 14.75 × 12 =
15. 15.65 × 14 =
16. 16.75 × 28 =
17. 17.40 × 15 =
18. 18.25 × 14 =
19. 19.36 × 65 =
20. 20.25 × 40 =
21. 21.18 × 65 =
22. 22.34 × 25 =
23. 23.35 × 14 =
24. 24.45 × 20 =
25. 25.26 × 35 =
26. 26.8 × 55 =
27. 27.45 × 24 =
28. 28.35 × 12 =
29. 29.55 × 32 =
30. 30.34 × 75 =
31. 31.15 × 14 =
32. 32.16 × 45 =
33. 33.36 × 35 =
34. 34.32 × 55 =
35. 35.35 × 40 =
36. 36.10 × 15 =
37. 37.22 × 125 =
38. 38.36 × 45 =
39. 39.55 × 36 =
40. 40.55 × 14 =

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