Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 655 · 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. 1.30 × 55 =
2. 2.30 × 125 =
3. 3.125 × 18 =
4. 4.45 × 8 =
5. 5.16 × 35 =
6. 6.75 × 34 =
7. 7.26 × 55 =
8. 8.15 × 32 =
9. 9.40 × 55 =
10. 10.75 × 24 =
11. 11.55 × 16 =
12. 12.35 × 12 =
13. 13.20 × 75 =
14. 14.34 × 45 =
15. 15.38 × 65 =
16. 16.30 × 75 =
17. 17.35 × 10 =
18. 18.12 × 65 =
19. 19.65 × 28 =
20. 20.35 × 10 =
21. 21.65 × 10 =
22. 22.15 × 38 =
23. 23.55 × 20 =
24. 24.22 × 35 =
25. 25.32 × 125 =
26. 26.45 × 38 =
27. 27.55 × 30 =
28. 28.35 × 30 =
29. 29.75 × 34 =
30. 30.35 × 16 =
31. 31.25 × 20 =
32. 32.16 × 15 =
33. 33.16 × 45 =
34. 34.14 × 75 =
35. 35.20 × 35 =
36. 36.75 × 30 =
37. 37.35 × 30 =
38. 38.25 × 14 =
39. 39.38 × 125 =
40. 40.25 × 8 =

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