Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 69 · 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. 1.24 × 25 =
2. 2.125 × 28 =
3. 3.15 × 14 =
4. 4.40 × 15 =
5. 5.20 × 65 =
6. 6.18 × 45 =
7. 7.55 × 24 =
8. 8.34 × 65 =
9. 9.16 × 35 =
10. 10.15 × 34 =
11. 11.16 × 125 =
12. 12.15 × 26 =
13. 13.45 × 32 =
14. 14.40 × 65 =
15. 15.15 × 24 =
16. 16.12 × 15 =
17. 17.55 × 40 =
18. 18.34 × 65 =
19. 19.14 × 75 =
20. 20.55 × 36 =
21. 21.34 × 15 =
22. 22.22 × 15 =
23. 23.125 × 6 =
24. 24.75 × 24 =
25. 25.55 × 8 =
26. 26.25 × 22 =
27. 27.45 × 24 =
28. 28.75 × 16 =
29. 29.25 × 36 =
30. 30.15 × 34 =
31. 31.35 × 38 =
32. 32.25 × 36 =
33. 33.25 × 30 =
34. 34.10 × 25 =
35. 35.12 × 25 =
36. 36.15 × 24 =
37. 37.25 × 10 =
38. 38.36 × 35 =
39. 39.36 × 125 =
40. 40.55 × 28 =

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