Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 335 · 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 × 55 =
2. 2.25 × 36 =
3. 3.20 × 15 =
4. 4.25 × 40 =
5. 5.24 × 45 =
6. 6.35 × 8 =
7. 7.6 × 55 =
8. 8.55 × 28 =
9. 9.65 × 38 =
10. 10.55 × 14 =
11. 11.35 × 30 =
12. 12.25 × 30 =
13. 13.12 × 65 =
14. 14.35 × 40 =
15. 15.125 × 26 =
16. 16.65 × 26 =
17. 17.75 × 32 =
18. 18.15 × 12 =
19. 19.35 × 10 =
20. 20.16 × 35 =
21. 21.6 × 15 =
22. 22.35 × 6 =
23. 23.35 × 16 =
24. 24.10 × 35 =
25. 25.22 × 75 =
26. 26.32 × 45 =
27. 27.55 × 8 =
28. 28.16 × 25 =
29. 29.34 × 45 =
30. 30.24 × 75 =
31. 31.18 × 35 =
32. 32.15 × 6 =
33. 33.65 × 12 =
34. 34.15 × 6 =
35. 35.32 × 25 =
36. 36.75 × 34 =
37. 37.35 × 10 =
38. 38.65 × 16 =
39. 39.25 × 22 =
40. 40.125 × 8 =

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