Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 22 · 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. 1.0.17 × 4 — where does the decimal point go? (a) 0.68 (b) 0.0068 (c) 0.068 (d) 6.8
2. 2.0.97 × 3 — where does the decimal point go? (a) 0.291 (b) 0.0291 (c) 2.91 (d) 29.1
3. 3.4.9 × 12 — where does the decimal point go? (a) 58.8 (b) 5.88 (c) 588 (d) 0.588
4. 4.9.7 × 9 — where does the decimal point go? (a) 87.3 (b) 873 (c) 8.73 (d) 0.873
5. 5.0.29 × 4 — where does the decimal point go? (a) 11.6 (b) 0.116 (c) 0.0116 (d) 1.16
6. 6.2.7 × 4.6 — where does the decimal point go? (a) 124.2 (b) 0.1242 (c) 1.242 (d) 12.42
7. 7.0.42 × 9 — where does the decimal point go? (a) 3.78 (b) 37.8 (c) 0.378 (d) 0.0378
8. 8.0.49 × 0.2 — where does the decimal point go? (a) 0.0098 (b) 0.098 (c) 0.00098 (d) 0.98
9. 9.0.57 × 6 — where does the decimal point go? (a) 3.42 (b) 34.2 (c) 0.342 (d) 0.0342
10. 10.0.36 × 0.3 — where does the decimal point go? (a) 1.08 (b) 0.00108 (c) 0.0108 (d) 0.108
11. 11.7.9 × 15 — where does the decimal point go? (a) 11.85 (b) 1185 (c) 118.5 (d) 1.185
12. 12.0.93 × 5 — where does the decimal point go? (a) 46.5 (b) 4.65 (c) 0.465 (d) 0.0465
13. 13.8.9 × 25 — where does the decimal point go? (a) 2225 (b) 222.5 (c) 22.25 (d) 2.225
14. 14.6.6 × 0.9 — where does the decimal point go? (a) 59.4 (b) 5.94 (c) 0.0594 (d) 0.594
15. 15.8.5 × 7 — where does the decimal point go? (a) 595 (b) 5.95 (c) 59.5 (d) 0.595
16. 16.1.7 × 8 — where does the decimal point go? (a) 13.6 (b) 1.36 (c) 136 (d) 0.136
17. 17.0.43 × 0.4 — where does the decimal point go? (a) 1.72 (b) 0.00172 (c) 0.172 (d) 0.0172
18. 18.0.96 × 0.7 — where does the decimal point go? (a) 0.672 (b) 0.00672 (c) 0.0672 (d) 6.72
19. 19.0.92 × 32 — where does the decimal point go? (a) 29.44 (b) 2.944 (c) 0.2944 (d) 294.4
20. 20.7.5 × 1.9 — where does the decimal point go? (a) 14.25 (b) 0.1425 (c) 1.425 (d) 142.5
21. 21.0.68 × 0.6 — where does the decimal point go? (a) 0.00408 (b) 4.08 (c) 0.408 (d) 0.0408
22. 22.0.47 × 0.5 — where does the decimal point go? (a) 0.0235 (b) 0.235 (c) 2.35 (d) 0.00235
23. 23.6.3 × 33 — where does the decimal point go? (a) 207.9 (b) 2079 (c) 20.79 (d) 2.079
24. 24.0.29 × 4.5 — where does the decimal point go? (a) 0.01305 (b) 1.305 (c) 0.1305 (d) 13.05
25. 25.0.72 × 0.3 — where does the decimal point go? (a) 2.16 (b) 0.0216 (c) 0.216 (d) 0.00216
26. 26.1.8 × 0.8 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 0.0144 (d) 1.44
27. 27.0.71 × 4 — where does the decimal point go? (a) 28.4 (b) 2.84 (c) 0.284 (d) 0.0284
28. 28.0.21 × 4.1 — where does the decimal point go? (a) 0.861 (b) 0.00861 (c) 0.0861 (d) 8.61
29. 29.0.32 × 14 — where does the decimal point go? (a) 0.448 (b) 0.0448 (c) 4.48 (d) 44.8
30. 30.0.27 × 2 — where does the decimal point go? (a) 5.4 (b) 0.0054 (c) 0.054 (d) 0.54
31. 31.0.61 × 2.6 — where does the decimal point go? (a) 0.1586 (b) 1.586 (c) 0.01586 (d) 15.86
32. 32.8.3 × 0.2 — where does the decimal point go? (a) 0.166 (b) 0.0166 (c) 1.66 (d) 16.6
33. 33.7.8 × 2 — where does the decimal point go? (a) 15.6 (b) 0.156 (c) 156 (d) 1.56
34. 34.0.72 × 3 — where does the decimal point go? (a) 2.16 (b) 0.0216 (c) 0.216 (d) 21.6
35. 35.0.64 × 1.2 — where does the decimal point go? (a) 7.68 (b) 0.0768 (c) 0.00768 (d) 0.768
36. 36.1.4 × 36 — where does the decimal point go? (a) 504 (b) 50.4 (c) 0.504 (d) 5.04
37. 37.9.8 × 4.2 — where does the decimal point go? (a) 41.16 (b) 4.116 (c) 411.6 (d) 0.4116
38. 38.0.77 × 29 — where does the decimal point go? (a) 223.3 (b) 0.2233 (c) 22.33 (d) 2.233
39. 39.0.93 × 0.9 — where does the decimal point go? (a) 0.837 (b) 8.37 (c) 0.0837 (d) 0.00837
40. 40.0.68 × 4.1 — where does the decimal point go? (a) 27.88 (b) 0.02788 (c) 2.788 (d) 0.2788

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