Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 337 · 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. 1.55 × 8 =
2. 2.18 × 75 =
3. 3.40 × 35 =
4. 4.55 × 10 =
5. 5.125 × 28 =
6. 6.16 × 35 =
7. 7.65 × 40 =
8. 8.12 × 125 =
9. 9.10 × 45 =
10. 10.15 × 10 =
11. 11.30 × 25 =
12. 12.55 × 22 =
13. 13.34 × 15 =
14. 14.125 × 24 =
15. 15.28 × 55 =
16. 16.6 × 15 =
17. 17.24 × 125 =
18. 18.55 × 18 =
19. 19.65 × 14 =
20. 20.24 × 15 =
21. 21.22 × 25 =
22. 22.55 × 36 =
23. 23.18 × 15 =
24. 24.10 × 35 =
25. 25.75 × 30 =
26. 26.45 × 34 =
27. 27.25 × 38 =
28. 28.25 × 30 =
29. 29.65 × 34 =
30. 30.65 × 26 =
31. 31.22 × 65 =
32. 32.125 × 40 =
33. 33.125 × 24 =
34. 34.15 × 24 =
35. 35.15 × 6 =
36. 36.55 × 16 =
37. 37.30 × 65 =
38. 38.20 × 15 =
39. 39.75 × 32 =
40. 40.15 × 38 =

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