Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 649 · 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. 1.12 × 55 =
2. 2.8 × 15 =
3. 3.8 × 65 =
4. 4.30 × 35 =
5. 5.35 × 6 =
6. 6.65 × 8 =
7. 7.75 × 36 =
8. 8.25 × 32 =
9. 9.20 × 25 =
10. 10.8 × 35 =
11. 11.35 × 22 =
12. 12.15 × 10 =
13. 13.22 × 35 =
14. 14.18 × 25 =
15. 15.55 × 8 =
16. 16.25 × 12 =
17. 17.35 × 8 =
18. 18.75 × 22 =
19. 19.25 × 14 =
20. 20.25 × 40 =
21. 21.12 × 35 =
22. 22.25 × 32 =
23. 23.26 × 25 =
24. 24.24 × 25 =
25. 25.15 × 40 =
26. 26.38 × 15 =
27. 27.40 × 35 =
28. 28.12 × 55 =
29. 29.75 × 28 =
30. 30.32 × 25 =
31. 31.26 × 125 =
32. 32.45 × 30 =
33. 33.25 × 36 =
34. 34.35 × 38 =
35. 35.65 × 6 =
36. 36.32 × 45 =
37. 37.22 × 45 =
38. 38.12 × 65 =
39. 39.14 × 65 =
40. 40.25 × 14 =

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