Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 400 · 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. 1.0.18 × 0.2 — where does the decimal point go? (a) 0.36 (b) 0.00036 (c) 0.0036 (d) 0.036
2. 2.2.5 × 3 — where does the decimal point go? (a) 0.75 (b) 75 (c) 0.075 (d) 7.5
3. 3.7.4 × 2.1 — where does the decimal point go? (a) 1.554 (b) 155.4 (c) 0.1554 (d) 15.54
4. 4.4.7 × 0.4 — where does the decimal point go? (a) 0.0188 (b) 18.8 (c) 1.88 (d) 0.188
5. 5.8.4 × 1.9 — where does the decimal point go? (a) 1.596 (b) 0.1596 (c) 159.6 (d) 15.96
6. 6.0.58 × 4.3 — where does the decimal point go? (a) 2.494 (b) 24.94 (c) 0.02494 (d) 0.2494
7. 7.2.5 × 2.1 — where does the decimal point go? (a) 0.525 (b) 52.5 (c) 5.25 (d) 0.0525
8. 8.8.8 × 4.3 — where does the decimal point go? (a) 378.4 (b) 0.3784 (c) 37.84 (d) 3.784
9. 9.4.8 × 0.6 — where does the decimal point go? (a) 2.88 (b) 28.8 (c) 0.0288 (d) 0.288
10. 10.7.5 × 9 — where does the decimal point go? (a) 67.5 (b) 0.675 (c) 675 (d) 6.75
11. 11.0.26 × 2.1 — where does the decimal point go? (a) 0.0546 (b) 5.46 (c) 0.00546 (d) 0.546
12. 12.9.8 × 2 — where does the decimal point go? (a) 19.6 (b) 196 (c) 1.96 (d) 0.196
13. 13.3.1 × 0.8 — where does the decimal point go? (a) 24.8 (b) 0.248 (c) 2.48 (d) 0.0248
14. 14.0.63 × 3 — where does the decimal point go? (a) 0.189 (b) 1.89 (c) 0.0189 (d) 18.9
15. 15.0.62 × 0.8 — where does the decimal point go? (a) 4.96 (b) 0.0496 (c) 0.00496 (d) 0.496
16. 16.0.26 × 0.9 — where does the decimal point go? (a) 0.0234 (b) 0.00234 (c) 2.34 (d) 0.234
17. 17.7.3 × 7 — where does the decimal point go? (a) 0.511 (b) 51.1 (c) 5.11 (d) 511
18. 18.5.5 × 21 — where does the decimal point go? (a) 11.55 (b) 1.155 (c) 1155 (d) 115.5
19. 19.0.17 × 43 — where does the decimal point go? (a) 7.31 (b) 0.731 (c) 0.0731 (d) 73.1
20. 20.5.4 × 0.3 — where does the decimal point go? (a) 16.2 (b) 0.162 (c) 0.0162 (d) 1.62
21. 21.3.6 × 0.3 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
22. 22.7.7 × 42 — where does the decimal point go? (a) 323.4 (b) 32.34 (c) 3.234 (d) 3234
23. 23.0.17 × 3 — where does the decimal point go? (a) 0.51 (b) 5.1 (c) 0.0051 (d) 0.051
24. 24.8.8 × 3 — where does the decimal point go? (a) 2.64 (b) 264 (c) 26.4 (d) 0.264
25. 25.0.72 × 6 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 4.32 (d) 0.0432
26. 26.9.3 × 0.3 — where does the decimal point go? (a) 27.9 (b) 0.0279 (c) 0.279 (d) 2.79
27. 27.0.12 × 2.8 — where does the decimal point go? (a) 0.00336 (b) 3.36 (c) 0.336 (d) 0.0336
28. 28.6.3 × 1.6 — where does the decimal point go? (a) 0.1008 (b) 10.08 (c) 1.008 (d) 100.8
29. 29.8.4 × 0.9 — where does the decimal point go? (a) 7.56 (b) 75.6 (c) 0.756 (d) 0.0756
30. 30.0.31 × 4.9 — where does the decimal point go? (a) 1.519 (b) 15.19 (c) 0.1519 (d) 0.01519
31. 31.6.9 × 7 — where does the decimal point go? (a) 48.3 (b) 483 (c) 4.83 (d) 0.483
32. 32.7.3 × 0.6 — where does the decimal point go? (a) 43.8 (b) 4.38 (c) 0.0438 (d) 0.438
33. 33.0.22 × 3 — where does the decimal point go? (a) 0.66 (b) 0.066 (c) 0.0066 (d) 6.6
34. 34.0.41 × 0.9 — where does the decimal point go? (a) 0.369 (b) 0.00369 (c) 0.0369 (d) 3.69
35. 35.3.3 × 2.5 — where does the decimal point go? (a) 0.825 (b) 8.25 (c) 82.5 (d) 0.0825
36. 36.0.82 × 12 — where does the decimal point go? (a) 98.4 (b) 0.0984 (c) 0.984 (d) 9.84
37. 37.9.3 × 0.8 — where does the decimal point go? (a) 7.44 (b) 0.744 (c) 0.0744 (d) 74.4
38. 38.0.18 × 4.3 — where does the decimal point go? (a) 0.774 (b) 7.74 (c) 0.00774 (d) 0.0774
39. 39.0.92 × 42 — where does the decimal point go? (a) 0.3864 (b) 38.64 (c) 386.4 (d) 3.864
40. 40.6.6 × 9 — where does the decimal point go? (a) 0.594 (b) 5.94 (c) 59.4 (d) 594

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