Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 361 · 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. 1.10 × 25 =
2. 2.36 × 55 =
3. 3.35 × 28 =
4. 4.125 × 6 =
5. 5.40 × 35 =
6. 6.55 × 38 =
7. 7.25 × 16 =
8. 8.75 × 26 =
9. 9.35 × 10 =
10. 10.125 × 10 =
11. 11.35 × 10 =
12. 12.36 × 75 =
13. 13.55 × 8 =
14. 14.65 × 18 =
15. 15.24 × 75 =
16. 16.25 × 32 =
17. 17.45 × 38 =
18. 18.22 × 35 =
19. 19.18 × 25 =
20. 20.38 × 25 =
21. 21.25 × 12 =
22. 22.45 × 12 =
23. 23.34 × 55 =
24. 24.125 × 36 =
25. 25.12 × 55 =
26. 26.38 × 125 =
27. 27.65 × 6 =
28. 28.32 × 15 =
29. 29.75 × 10 =
30. 30.65 × 30 =
31. 31.15 × 8 =
32. 32.34 × 15 =
33. 33.45 × 16 =
34. 34.15 × 10 =
35. 35.18 × 75 =
36. 36.125 × 6 =
37. 37.45 × 30 =
38. 38.75 × 18 =
39. 39.35 × 28 =
40. 40.32 × 15 =

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