Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 421 · 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 — where does the decimal point go? (a) 194 (b) 1.94 (c) 0.194 (d) 19.4
2. 2.0.38 × 0.8 — where does the decimal point go? (a) 0.00304 (b) 3.04 (c) 0.304 (d) 0.0304
3. 3.5.4 × 4 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 216
4. 4.1.9 × 11 — where does the decimal point go? (a) 20.9 (b) 2.09 (c) 0.209 (d) 209
5. 5.7.6 × 9 — where does the decimal point go? (a) 68.4 (b) 0.684 (c) 6.84 (d) 684
6. 6.9.9 × 8 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 7.92 (d) 792
7. 7.7.2 × 9 — where does the decimal point go? (a) 0.648 (b) 64.8 (c) 648 (d) 6.48
8. 8.3.9 × 39 — where does the decimal point go? (a) 15.21 (b) 1.521 (c) 152.1 (d) 1521
9. 9.0.19 × 5 — where does the decimal point go? (a) 0.95 (b) 0.0095 (c) 9.5 (d) 0.095
10. 10.5.5 × 7 — where does the decimal point go? (a) 38.5 (b) 385 (c) 3.85 (d) 0.385
11. 11.9.4 × 4 — where does the decimal point go? (a) 37.6 (b) 376 (c) 0.376 (d) 3.76
12. 12.0.21 × 38 — where does the decimal point go? (a) 7.98 (b) 0.0798 (c) 0.798 (d) 79.8
13. 13.8.9 × 47 — where does the decimal point go? (a) 418.3 (b) 41.83 (c) 4.183 (d) 4183
14. 14.0.27 × 1.7 — where does the decimal point go? (a) 0.459 (b) 0.0459 (c) 4.59 (d) 0.00459
15. 15.4.6 × 0.2 — where does the decimal point go? (a) 9.2 (b) 0.92 (c) 0.0092 (d) 0.092
16. 16.0.65 × 0.3 — where does the decimal point go? (a) 0.195 (b) 0.00195 (c) 1.95 (d) 0.0195
17. 17.9.5 × 0.3 — where does the decimal point go? (a) 2.85 (b) 0.0285 (c) 28.5 (d) 0.285
18. 18.6.3 × 35 — where does the decimal point go? (a) 220.5 (b) 22.05 (c) 2.205 (d) 2205
19. 19.0.33 × 3 — where does the decimal point go? (a) 0.0099 (b) 0.99 (c) 0.099 (d) 9.9
20. 20.1.3 × 3 — where does the decimal point go? (a) 39 (b) 0.039 (c) 3.9 (d) 0.39
21. 21.3.7 × 32 — where does the decimal point go? (a) 1184 (b) 1.184 (c) 118.4 (d) 11.84
22. 22.3.1 × 29 — where does the decimal point go? (a) 8.99 (b) 0.899 (c) 899 (d) 89.9
23. 23.0.13 × 0.4 — where does the decimal point go? (a) 0.0052 (b) 0.00052 (c) 0.052 (d) 0.52
24. 24.5.8 × 3 — where does the decimal point go? (a) 17.4 (b) 1.74 (c) 174 (d) 0.174
25. 25.0.21 × 7 — where does the decimal point go? (a) 14.7 (b) 1.47 (c) 0.0147 (d) 0.147
26. 26.0.56 × 42 — where does the decimal point go? (a) 23.52 (b) 2.352 (c) 0.2352 (d) 235.2
27. 27.0.68 × 4 — where does the decimal point go? (a) 0.272 (b) 27.2 (c) 0.0272 (d) 2.72
28. 28.0.37 × 9 — where does the decimal point go? (a) 3.33 (b) 33.3 (c) 0.333 (d) 0.0333
29. 29.0.74 × 8 — where does the decimal point go? (a) 59.2 (b) 0.0592 (c) 0.592 (d) 5.92
30. 30.0.74 × 0.4 — where does the decimal point go? (a) 0.0296 (b) 0.296 (c) 0.00296 (d) 2.96
31. 31.0.25 × 35 — where does the decimal point go? (a) 0.0875 (b) 87.5 (c) 8.75 (d) 0.875
32. 32.0.79 × 3.7 — where does the decimal point go? (a) 0.2923 (b) 0.02923 (c) 29.23 (d) 2.923
33. 33.0.63 × 0.9 — where does the decimal point go? (a) 0.0567 (b) 0.00567 (c) 5.67 (d) 0.567
34. 34.2.9 × 0.4 — where does the decimal point go? (a) 11.6 (b) 0.116 (c) 0.0116 (d) 1.16
35. 35.2.4 × 9 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 216
36. 36.7.9 × 0.7 — where does the decimal point go? (a) 0.553 (b) 55.3 (c) 0.0553 (d) 5.53
37. 37.0.21 × 4 — where does the decimal point go? (a) 8.4 (b) 0.0084 (c) 0.084 (d) 0.84
38. 38.1.4 × 0.7 — where does the decimal point go? (a) 9.8 (b) 0.98 (c) 0.0098 (d) 0.098
39. 39.8.6 × 42 — where does the decimal point go? (a) 3612 (b) 3.612 (c) 361.2 (d) 36.12
40. 40.8.8 × 17 — where does the decimal point go? (a) 149.6 (b) 14.96 (c) 1.496 (d) 1496

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