Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 699 · 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 × 12 =
2. 2.28 × 125 =
3. 3.125 × 12 =
4. 4.14 × 25 =
5. 5.18 × 55 =
6. 6.75 × 36 =
7. 7.25 × 14 =
8. 8.16 × 35 =
9. 9.25 × 10 =
10. 10.125 × 12 =
11. 11.55 × 14 =
12. 12.55 × 40 =
13. 13.34 × 125 =
14. 14.40 × 25 =
15. 15.30 × 65 =
16. 16.25 × 28 =
17. 17.45 × 20 =
18. 18.20 × 55 =
19. 19.25 × 18 =
20. 20.22 × 35 =
21. 21.6 × 65 =
22. 22.32 × 45 =
23. 23.35 × 32 =
24. 24.10 × 75 =
25. 25.55 × 8 =
26. 26.125 × 6 =
27. 27.75 × 26 =
28. 28.65 × 12 =
29. 29.22 × 125 =
30. 30.15 × 34 =
31. 31.38 × 45 =
32. 32.18 × 75 =
33. 33.65 × 26 =
34. 34.55 × 10 =
35. 35.16 × 25 =
36. 36.10 × 75 =
37. 37.32 × 15 =
38. 38.8 × 75 =
39. 39.22 × 35 =
40. 40.6 × 15 =

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