Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 410 · 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. 1.0.98 × 8 — where does the decimal point go? (a) 7.84 (b) 0.784 (c) 78.4 (d) 0.0784
2. 2.4.5 × 7 — where does the decimal point go? (a) 3.15 (b) 31.5 (c) 315 (d) 0.315
3. 3.3.1 × 0.9 — where does the decimal point go? (a) 0.279 (b) 2.79 (c) 0.0279 (d) 27.9
4. 4.9.3 × 6 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 55.8 (d) 558
5. 5.3.4 × 6 — where does the decimal point go? (a) 0.204 (b) 2.04 (c) 20.4 (d) 204
6. 6.0.66 × 0.4 — where does the decimal point go? (a) 0.00264 (b) 0.0264 (c) 0.264 (d) 2.64
7. 7.0.24 × 19 — where does the decimal point go? (a) 45.6 (b) 0.0456 (c) 4.56 (d) 0.456
8. 8.0.65 × 0.9 — where does the decimal point go? (a) 0.585 (b) 0.00585 (c) 5.85 (d) 0.0585
9. 9.4.7 × 2 — where does the decimal point go? (a) 0.094 (b) 9.4 (c) 94 (d) 0.94
10. 10.0.33 × 7 — where does the decimal point go? (a) 0.0231 (b) 23.1 (c) 2.31 (d) 0.231
11. 11.4.3 × 4 — where does the decimal point go? (a) 17.2 (b) 1.72 (c) 0.172 (d) 172
12. 12.0.21 × 3 — where does the decimal point go? (a) 0.0063 (b) 0.63 (c) 0.063 (d) 6.3
13. 13.4.9 × 6 — where does the decimal point go? (a) 0.294 (b) 294 (c) 2.94 (d) 29.4
14. 14.0.19 × 0.4 — where does the decimal point go? (a) 0.076 (b) 0.76 (c) 0.0076 (d) 0.00076
15. 15.9.3 × 0.7 — where does the decimal point go? (a) 65.1 (b) 0.651 (c) 6.51 (d) 0.0651
16. 16.1.4 × 0.2 — where does the decimal point go? (a) 0.028 (b) 0.28 (c) 2.8 (d) 0.0028
17. 17.4.2 × 4.6 — where does the decimal point go? (a) 19.32 (b) 1.932 (c) 193.2 (d) 0.1932
18. 18.1.8 × 18 — where does the decimal point go? (a) 3.24 (b) 0.324 (c) 324 (d) 32.4
19. 19.0.28 × 13 — where does the decimal point go? (a) 36.4 (b) 0.364 (c) 0.0364 (d) 3.64
20. 20.0.18 × 23 — where does the decimal point go? (a) 41.4 (b) 0.0414 (c) 4.14 (d) 0.414
21. 21.7.9 × 44 — where does the decimal point go? (a) 3.476 (b) 347.6 (c) 34.76 (d) 3476
22. 22.0.65 × 31 — where does the decimal point go? (a) 2.015 (b) 201.5 (c) 20.15 (d) 0.2015
23. 23.8.7 × 0.8 — where does the decimal point go? (a) 6.96 (b) 0.0696 (c) 0.696 (d) 69.6
24. 24.4.9 × 2 — where does the decimal point go? (a) 9.8 (b) 0.98 (c) 98 (d) 0.098
25. 25.0.67 × 17 — where does the decimal point go? (a) 1.139 (b) 11.39 (c) 113.9 (d) 0.1139
26. 26.0.22 × 0.2 — where does the decimal point go? (a) 0.44 (b) 0.044 (c) 0.0044 (d) 0.00044
27. 27.0.35 × 1.3 — where does the decimal point go? (a) 0.00455 (b) 0.0455 (c) 0.455 (d) 4.55
28. 28.3.2 × 2.3 — where does the decimal point go? (a) 0.0736 (b) 0.736 (c) 73.6 (d) 7.36
29. 29.1.6 × 43 — where does the decimal point go? (a) 6.88 (b) 0.688 (c) 68.8 (d) 688
30. 30.0.39 × 4.8 — where does the decimal point go? (a) 1.872 (b) 18.72 (c) 0.01872 (d) 0.1872
31. 31.0.36 × 3 — where does the decimal point go? (a) 0.108 (b) 10.8 (c) 0.0108 (d) 1.08
32. 32.0.82 × 0.7 — where does the decimal point go? (a) 5.74 (b) 0.574 (c) 0.0574 (d) 0.00574
33. 33.5.5 × 45 — where does the decimal point go? (a) 24.75 (b) 247.5 (c) 2475 (d) 2.475
34. 34.0.62 × 16 — where does the decimal point go? (a) 0.0992 (b) 0.992 (c) 99.2 (d) 9.92
35. 35.8.6 × 4.7 — where does the decimal point go? (a) 40.42 (b) 4.042 (c) 404.2 (d) 0.4042
36. 36.1.4 × 1.9 — where does the decimal point go? (a) 0.266 (b) 0.0266 (c) 2.66 (d) 26.6
37. 37.3.7 × 0.6 — where does the decimal point go? (a) 2.22 (b) 22.2 (c) 0.222 (d) 0.0222
38. 38.0.94 × 9 — where does the decimal point go? (a) 0.846 (b) 0.0846 (c) 84.6 (d) 8.46
39. 39.0.53 × 14 — where does the decimal point go? (a) 0.742 (b) 74.2 (c) 7.42 (d) 0.0742
40. 40.2.5 × 15 — where does the decimal point go? (a) 0.375 (b) 37.5 (c) 375 (d) 3.75

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