Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 344 · 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 × 6 =
2. 2.55 × 34 =
3. 3.35 × 14 =
4. 4.25 × 24 =
5. 5.12 × 125 =
6. 6.28 × 125 =
7. 7.28 × 15 =
8. 8.75 × 8 =
9. 9.20 × 55 =
10. 10.25 × 6 =
11. 11.35 × 40 =
12. 12.45 × 14 =
13. 13.8 × 35 =
14. 14.15 × 12 =
15. 15.25 × 32 =
16. 16.22 × 125 =
17. 17.45 × 18 =
18. 18.38 × 65 =
19. 19.36 × 55 =
20. 20.25 × 34 =
21. 21.75 × 34 =
22. 22.35 × 24 =
23. 23.24 × 55 =
24. 24.75 × 10 =
25. 25.45 × 20 =
26. 26.30 × 65 =
27. 27.34 × 65 =
28. 28.25 × 32 =
29. 29.38 × 55 =
30. 30.40 × 25 =
31. 31.14 × 55 =
32. 32.125 × 6 =
33. 33.26 × 25 =
34. 34.65 × 26 =
35. 35.25 × 8 =
36. 36.35 × 8 =
37. 37.24 × 45 =
38. 38.35 × 34 =
39. 39.12 × 35 =
40. 40.18 × 25 =

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