Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 2 · 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. 2.65 × 38 =
3. 3.14 × 25 =
4. 4.28 × 15 =
5. 5.20 × 65 =
6. 6.25 × 36 =
7. 7.30 × 15 =
8. 8.25 × 30 =
9. 9.65 × 26 =
10. 10.6 × 55 =
11. 11.15 × 36 =
12. 12.8 × 65 =
13. 13.125 × 10 =
14. 14.6 × 55 =
15. 15.35 × 16 =
16. 16.15 × 40 =
17. 17.45 × 40 =
18. 18.75 × 28 =
19. 19.32 × 15 =
20. 20.40 × 125 =
21. 21.15 × 14 =
22. 22.25 × 24 =
23. 23.14 × 25 =
24. 24.25 × 24 =
25. 25.25 × 14 =
26. 26.40 × 125 =
27. 27.55 × 26 =
28. 28.22 × 125 =
29. 29.75 × 12 =
30. 30.14 × 15 =
31. 31.65 × 16 =
32. 32.25 × 24 =
33. 33.26 × 65 =
34. 34.24 × 55 =
35. 35.55 × 8 =
36. 36.22 × 15 =
37. 37.55 × 20 =
38. 38.45 × 26 =
39. 39.35 × 6 =
40. 40.28 × 35 =

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