Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 980 · 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. 1.14 × 55 =
2. 2.75 × 16 =
3. 3.18 × 65 =
4. 4.6 × 25 =
5. 5.36 × 75 =
6. 6.125 × 6 =
7. 7.32 × 25 =
8. 8.25 × 20 =
9. 9.45 × 28 =
10. 10.65 × 34 =
11. 11.8 × 55 =
12. 12.36 × 75 =
13. 13.32 × 45 =
14. 14.15 × 24 =
15. 15.25 × 14 =
16. 16.125 × 30 =
17. 17.35 × 36 =
18. 18.36 × 75 =
19. 19.30 × 65 =
20. 20.65 × 10 =
21. 21.45 × 10 =
22. 22.55 × 40 =
23. 23.75 × 26 =
24. 24.35 × 18 =
25. 25.20 × 35 =
26. 26.10 × 125 =
27. 27.35 × 16 =
28. 28.45 × 10 =
29. 29.10 × 45 =
30. 30.12 × 25 =
31. 31.6 × 25 =
32. 32.125 × 40 =
33. 33.22 × 15 =
34. 34.25 × 34 =
35. 35.55 × 32 =
36. 36.125 × 6 =
37. 37.125 × 12 =
38. 38.35 × 8 =
39. 39.16 × 55 =
40. 40.55 × 12 =

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