Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 224 · 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. 1.8 × 65 =
2. 2.36 × 55 =
3. 3.28 × 15 =
4. 4.45 × 12 =
5. 5.25 × 14 =
6. 6.18 × 55 =
7. 7.35 × 16 =
8. 8.10 × 75 =
9. 9.6 × 25 =
10. 10.16 × 25 =
11. 11.75 × 20 =
12. 12.45 × 40 =
13. 13.15 × 28 =
14. 14.12 × 15 =
15. 15.55 × 26 =
16. 16.15 × 8 =
17. 17.32 × 65 =
18. 18.125 × 24 =
19. 19.36 × 75 =
20. 20.15 × 6 =
21. 21.20 × 15 =
22. 22.18 × 45 =
23. 23.36 × 125 =
24. 24.6 × 125 =
25. 25.28 × 55 =
26. 26.18 × 65 =
27. 27.22 × 125 =
28. 28.16 × 75 =
29. 29.25 × 8 =
30. 30.8 × 125 =
31. 31.38 × 35 =
32. 32.75 × 40 =
33. 33.30 × 75 =
34. 34.15 × 6 =
35. 35.55 × 40 =
36. 36.12 × 25 =
37. 37.45 × 24 =
38. 38.55 × 38 =
39. 39.55 × 28 =
40. 40.75 × 36 =

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