Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 41 · 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 × 12 =
2. 2.10 × 75 =
3. 3.22 × 55 =
4. 4.55 × 26 =
5. 5.45 × 36 =
6. 6.45 × 18 =
7. 7.35 × 14 =
8. 8.15 × 10 =
9. 9.45 × 16 =
10. 10.25 × 36 =
11. 11.15 × 36 =
12. 12.125 × 20 =
13. 13.55 × 26 =
14. 14.36 × 75 =
15. 15.55 × 24 =
16. 16.30 × 25 =
17. 17.22 × 45 =
18. 18.28 × 55 =
19. 19.25 × 26 =
20. 20.65 × 28 =
21. 21.35 × 34 =
22. 22.45 × 14 =
23. 23.34 × 15 =
24. 24.35 × 38 =
25. 25.24 × 125 =
26. 26.15 × 22 =
27. 27.35 × 10 =
28. 28.20 × 25 =
29. 29.10 × 35 =
30. 30.35 × 18 =
31. 31.6 × 75 =
32. 32.8 × 25 =
33. 33.35 × 6 =
34. 34.55 × 12 =
35. 35.34 × 35 =
36. 36.35 × 30 =
37. 37.30 × 65 =
38. 38.25 × 14 =
39. 39.14 × 75 =
40. 40.22 × 15 =

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