Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 200 · 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. 1.36 × 55 =
2. 2.15 × 10 =
3. 3.15 × 28 =
4. 4.28 × 65 =
5. 5.40 × 25 =
6. 6.55 × 16 =
7. 7.15 × 22 =
8. 8.30 × 15 =
9. 9.25 × 14 =
10. 10.26 × 25 =
11. 11.55 × 38 =
12. 12.15 × 38 =
13. 13.18 × 125 =
14. 14.75 × 10 =
15. 15.14 × 65 =
16. 16.35 × 12 =
17. 17.14 × 55 =
18. 18.55 × 30 =
19. 19.75 × 24 =
20. 20.15 × 24 =
21. 21.35 × 36 =
22. 22.25 × 28 =
23. 23.35 × 18 =
24. 24.22 × 15 =
25. 25.14 × 55 =
26. 26.20 × 35 =
27. 27.32 × 75 =
28. 28.30 × 55 =
29. 29.34 × 55 =
30. 30.55 × 34 =
31. 31.15 × 22 =
32. 32.65 × 10 =
33. 33.65 × 36 =
34. 34.15 × 16 =
35. 35.10 × 65 =
36. 36.35 × 16 =
37. 37.45 × 14 =
38. 38.65 × 16 =
39. 39.25 × 22 =
40. 40.16 × 25 =

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