Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 71 · 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. 1.9.8 × 4 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 392 (d) 0.392
2. 2.1.7 × 0.3 — where does the decimal point go? (a) 0.51 (b) 0.051 (c) 0.0051 (d) 5.1
3. 3.0.44 × 1.8 — where does the decimal point go? (a) 0.792 (b) 0.00792 (c) 7.92 (d) 0.0792
4. 4.6.4 × 24 — where does the decimal point go? (a) 1536 (b) 1.536 (c) 15.36 (d) 153.6
5. 5.0.77 × 6 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 46.2 (d) 0.0462
6. 6.9.2 × 11 — where does the decimal point go? (a) 101.2 (b) 1.012 (c) 1012 (d) 10.12
7. 7.0.29 × 6 — where does the decimal point go? (a) 0.0174 (b) 17.4 (c) 0.174 (d) 1.74
8. 8.6.8 × 27 — where does the decimal point go? (a) 183.6 (b) 1836 (c) 1.836 (d) 18.36
9. 9.0.66 × 2.4 — where does the decimal point go? (a) 0.01584 (b) 15.84 (c) 1.584 (d) 0.1584
10. 10.2.2 × 4.2 — where does the decimal point go? (a) 9.24 (b) 92.4 (c) 0.0924 (d) 0.924
11. 11.0.89 × 4 — where does the decimal point go? (a) 35.6 (b) 0.356 (c) 3.56 (d) 0.0356
12. 12.4.6 × 9 — where does the decimal point go? (a) 4.14 (b) 414 (c) 0.414 (d) 41.4
13. 13.0.25 × 0.3 — where does the decimal point go? (a) 0.75 (b) 0.0075 (c) 0.075 (d) 0.00075
14. 14.0.72 × 6 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 0.0432 (d) 4.32
15. 15.0.54 × 4 — where does the decimal point go? (a) 0.0216 (b) 21.6 (c) 2.16 (d) 0.216
16. 16.0.19 × 3.9 — where does the decimal point go? (a) 0.741 (b) 7.41 (c) 0.00741 (d) 0.0741
17. 17.0.39 × 0.9 — where does the decimal point go? (a) 3.51 (b) 0.351 (c) 0.00351 (d) 0.0351
18. 18.1.7 × 0.9 — where does the decimal point go? (a) 1.53 (b) 0.0153 (c) 15.3 (d) 0.153
19. 19.0.49 × 43 — where does the decimal point go? (a) 2.107 (b) 0.2107 (c) 210.7 (d) 21.07
20. 20.0.29 × 2 — where does the decimal point go? (a) 0.58 (b) 0.058 (c) 5.8 (d) 0.0058
21. 21.4.3 × 0.7 — where does the decimal point go? (a) 0.301 (b) 0.0301 (c) 3.01 (d) 30.1
22. 22.5.3 × 3 — where does the decimal point go? (a) 1.59 (b) 159 (c) 0.159 (d) 15.9
23. 23.3.4 × 0.7 — where does the decimal point go? (a) 0.0238 (b) 2.38 (c) 23.8 (d) 0.238
24. 24.0.57 × 9 — where does the decimal point go? (a) 0.513 (b) 5.13 (c) 51.3 (d) 0.0513
25. 25.3.4 × 0.3 — where does the decimal point go? (a) 0.0102 (b) 0.102 (c) 10.2 (d) 1.02
26. 26.0.45 × 11 — where does the decimal point go? (a) 0.0495 (b) 0.495 (c) 4.95 (d) 49.5
27. 27.0.15 × 1.7 — where does the decimal point go? (a) 0.0255 (b) 2.55 (c) 0.00255 (d) 0.255
28. 28.4.4 × 36 — where does the decimal point go? (a) 158.4 (b) 1584 (c) 15.84 (d) 1.584
29. 29.0.51 × 32 — where does the decimal point go? (a) 163.2 (b) 1.632 (c) 16.32 (d) 0.1632
30. 30.5.2 × 2.7 — where does the decimal point go? (a) 14.04 (b) 0.1404 (c) 1.404 (d) 140.4
31. 31.5.4 × 3.3 — where does the decimal point go? (a) 17.82 (b) 0.1782 (c) 1.782 (d) 178.2
32. 32.0.69 × 0.3 — where does the decimal point go? (a) 0.0207 (b) 0.00207 (c) 0.207 (d) 2.07
33. 33.0.19 × 0.8 — where does the decimal point go? (a) 0.152 (b) 0.0152 (c) 0.00152 (d) 1.52
34. 34.0.72 × 4.8 — where does the decimal point go? (a) 3.456 (b) 0.03456 (c) 34.56 (d) 0.3456
35. 35.7.2 × 0.3 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 0.0216
36. 36.4.1 × 5 — where does the decimal point go? (a) 205 (b) 0.205 (c) 20.5 (d) 2.05
37. 37.4.7 × 14 — where does the decimal point go? (a) 658 (b) 0.658 (c) 65.8 (d) 6.58
38. 38.2.2 × 11 — where does the decimal point go? (a) 242 (b) 0.242 (c) 24.2 (d) 2.42
39. 39.0.28 × 37 — where does the decimal point go? (a) 103.6 (b) 0.1036 (c) 10.36 (d) 1.036
40. 40.3.2 × 7 — where does the decimal point go? (a) 224 (b) 0.224 (c) 2.24 (d) 22.4

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