Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 714 · 40 questions

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

1. 1.9.7 × 2.5 — where does the decimal point go? (a) 242.5 (b) 0.2425 (c) 2.425 (d) 24.25
2. 2.5.7 × 9 — where does the decimal point go? (a) 513 (b) 0.513 (c) 51.3 (d) 5.13
3. 3.9.2 × 3 — where does the decimal point go? (a) 276 (b) 0.276 (c) 2.76 (d) 27.6
4. 4.5.8 × 11 — where does the decimal point go? (a) 0.638 (b) 638 (c) 6.38 (d) 63.8
5. 5.0.83 × 5 — where does the decimal point go? (a) 0.0415 (b) 41.5 (c) 4.15 (d) 0.415
6. 6.0.33 × 3.9 — where does the decimal point go? (a) 0.01287 (b) 1.287 (c) 12.87 (d) 0.1287
7. 7.5.3 × 0.2 — where does the decimal point go? (a) 0.106 (b) 10.6 (c) 1.06 (d) 0.0106
8. 8.4.9 × 1.3 — where does the decimal point go? (a) 0.637 (b) 6.37 (c) 0.0637 (d) 63.7
9. 9.9.7 × 26 — where does the decimal point go? (a) 2522 (b) 252.2 (c) 25.22 (d) 2.522
10. 10.0.54 × 0.9 — where does the decimal point go? (a) 0.486 (b) 4.86 (c) 0.00486 (d) 0.0486
11. 11.3.6 × 3 — where does the decimal point go? (a) 10.8 (b) 1.08 (c) 108 (d) 0.108
12. 12.0.28 × 9 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 0.252 (d) 2.52
13. 13.2.2 × 0.9 — where does the decimal point go? (a) 0.0198 (b) 1.98 (c) 19.8 (d) 0.198
14. 14.0.62 × 2 — where does the decimal point go? (a) 1.24 (b) 12.4 (c) 0.124 (d) 0.0124
15. 15.0.87 × 1.6 — where does the decimal point go? (a) 1.392 (b) 0.1392 (c) 0.01392 (d) 13.92
16. 16.0.53 × 1.9 — where does the decimal point go? (a) 0.1007 (b) 1.007 (c) 0.01007 (d) 10.07
17. 17.0.73 × 1.9 — where does the decimal point go? (a) 0.1387 (b) 0.01387 (c) 1.387 (d) 13.87
18. 18.1.2 × 0.7 — where does the decimal point go? (a) 0.084 (b) 8.4 (c) 0.84 (d) 0.0084
19. 19.0.91 × 0.2 — where does the decimal point go? (a) 1.82 (b) 0.182 (c) 0.0182 (d) 0.00182
20. 20.0.17 × 0.6 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 1.02 (d) 0.00102
21. 21.0.99 × 46 — where does the decimal point go? (a) 4.554 (b) 0.4554 (c) 45.54 (d) 455.4
22. 22.2.4 × 13 — where does the decimal point go? (a) 0.312 (b) 31.2 (c) 3.12 (d) 312
23. 23.0.61 × 18 — where does the decimal point go? (a) 1.098 (b) 0.1098 (c) 109.8 (d) 10.98
24. 24.1.4 × 7 — where does the decimal point go? (a) 0.98 (b) 98 (c) 9.8 (d) 0.098
25. 25.0.19 × 0.8 — where does the decimal point go? (a) 0.00152 (b) 1.52 (c) 0.152 (d) 0.0152
26. 26.0.87 × 0.6 — where does the decimal point go? (a) 0.00522 (b) 5.22 (c) 0.0522 (d) 0.522
27. 27.0.48 × 7 — where does the decimal point go? (a) 33.6 (b) 0.336 (c) 0.0336 (d) 3.36
28. 28.0.82 × 24 — where does the decimal point go? (a) 0.1968 (b) 196.8 (c) 19.68 (d) 1.968
29. 29.0.74 × 0.7 — where does the decimal point go? (a) 0.518 (b) 0.0518 (c) 5.18 (d) 0.00518
30. 30.9.6 × 6 — where does the decimal point go? (a) 5.76 (b) 576 (c) 57.6 (d) 0.576
31. 31.6.2 × 11 — where does the decimal point go? (a) 6.82 (b) 682 (c) 68.2 (d) 0.682
32. 32.2.9 × 43 — where does the decimal point go? (a) 1247 (b) 12.47 (c) 124.7 (d) 1.247
33. 33.5.2 × 0.3 — where does the decimal point go? (a) 0.156 (b) 0.0156 (c) 1.56 (d) 15.6
34. 34.1.9 × 0.9 — where does the decimal point go? (a) 1.71 (b) 0.171 (c) 0.0171 (d) 17.1
35. 35.9.2 × 3.7 — where does the decimal point go? (a) 34.04 (b) 0.3404 (c) 340.4 (d) 3.404
36. 36.0.49 × 6 — where does the decimal point go? (a) 0.0294 (b) 0.294 (c) 29.4 (d) 2.94
37. 37.0.45 × 13 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 0.0585 (d) 58.5
38. 38.9.1 × 6 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 54.6 (d) 546
39. 39.0.38 × 8 — where does the decimal point go? (a) 3.04 (b) 30.4 (c) 0.304 (d) 0.0304
40. 40.3.7 × 3.1 — where does the decimal point go? (a) 0.1147 (b) 11.47 (c) 114.7 (d) 1.147

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