Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 833 · 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. 1.35 × 28 =
2. 2.55 × 6 =
3. 3.65 × 22 =
4. 4.14 × 15 =
5. 5.15 × 28 =
6. 6.15 × 6 =
7. 7.45 × 12 =
8. 8.14 × 55 =
9. 9.75 × 26 =
10. 10.125 × 8 =
11. 11.6 × 35 =
12. 12.45 × 34 =
13. 13.38 × 35 =
14. 14.125 × 36 =
15. 15.8 × 35 =
16. 16.55 × 38 =
17. 17.38 × 65 =
18. 18.40 × 75 =
19. 19.35 × 14 =
20. 20.125 × 22 =
21. 21.32 × 65 =
22. 22.15 × 32 =
23. 23.25 × 8 =
24. 24.15 × 6 =
25. 25.35 × 20 =
26. 26.45 × 16 =
27. 27.25 × 36 =
28. 28.26 × 65 =
29. 29.34 × 125 =
30. 30.22 × 45 =
31. 31.25 × 30 =
32. 32.55 × 36 =
33. 33.40 × 15 =
34. 34.14 × 75 =
35. 35.16 × 55 =
36. 36.12 × 55 =
37. 37.26 × 15 =
38. 38.18 × 75 =
39. 39.8 × 125 =
40. 40.18 × 125 =

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