Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 550 · 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. 1.25 × 14 =
2. 2.32 × 25 =
3. 3.8 × 15 =
4. 4.32 × 55 =
5. 5.125 × 18 =
6. 6.75 × 22 =
7. 7.34 × 35 =
8. 8.15 × 10 =
9. 9.25 × 30 =
10. 10.15 × 16 =
11. 11.75 × 26 =
12. 12.35 × 26 =
13. 13.6 × 15 =
14. 14.45 × 26 =
15. 15.12 × 25 =
16. 16.32 × 65 =
17. 17.35 × 22 =
18. 18.36 × 55 =
19. 19.75 × 30 =
20. 20.32 × 15 =
21. 21.15 × 20 =
22. 22.32 × 15 =
23. 23.75 × 28 =
24. 24.18 × 15 =
25. 25.45 × 14 =
26. 26.24 × 35 =
27. 27.65 × 26 =
28. 28.35 × 10 =
29. 29.34 × 45 =
30. 30.28 × 15 =
31. 31.22 × 65 =
32. 32.25 × 6 =
33. 33.25 × 18 =
34. 34.75 × 22 =
35. 35.125 × 40 =
36. 36.125 × 24 =
37. 37.15 × 6 =
38. 38.125 × 14 =
39. 39.25 × 16 =
40. 40.24 × 45 =

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