Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 408 · 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. 1.8.6 × 4.8 — where does the decimal point go? (a) 412.8 (b) 41.28 (c) 0.4128 (d) 4.128
2. 2.0.23 × 7 — where does the decimal point go? (a) 0.0161 (b) 16.1 (c) 1.61 (d) 0.161
3. 3.0.85 × 0.3 — where does the decimal point go? (a) 0.00255 (b) 0.0255 (c) 2.55 (d) 0.255
4. 4.8.6 × 3.9 — where does the decimal point go? (a) 335.4 (b) 0.3354 (c) 3.354 (d) 33.54
5. 5.0.33 × 24 — where does the decimal point go? (a) 0.0792 (b) 7.92 (c) 0.792 (d) 79.2
6. 6.2.9 × 0.2 — where does the decimal point go? (a) 0.0058 (b) 5.8 (c) 0.058 (d) 0.58
7. 7.0.91 × 18 — where does the decimal point go? (a) 1.638 (b) 163.8 (c) 0.1638 (d) 16.38
8. 8.0.74 × 2.1 — where does the decimal point go? (a) 15.54 (b) 0.1554 (c) 1.554 (d) 0.01554
9. 9.0.53 × 6 — where does the decimal point go? (a) 3.18 (b) 31.8 (c) 0.318 (d) 0.0318
10. 10.2.7 × 7 — where does the decimal point go? (a) 0.189 (b) 1.89 (c) 18.9 (d) 189
11. 11.5.7 × 3 — where does the decimal point go? (a) 0.171 (b) 17.1 (c) 171 (d) 1.71
12. 12.5.4 × 2 — where does the decimal point go? (a) 1.08 (b) 10.8 (c) 0.108 (d) 108
13. 13.1.5 × 2.5 — where does the decimal point go? (a) 37.5 (b) 0.375 (c) 0.0375 (d) 3.75
14. 14.0.13 × 0.7 — where does the decimal point go? (a) 0.0091 (b) 0.91 (c) 0.091 (d) 0.00091
15. 15.2.4 × 11 — where does the decimal point go? (a) 264 (b) 0.264 (c) 2.64 (d) 26.4
16. 16.0.92 × 2 — where does the decimal point go? (a) 18.4 (b) 1.84 (c) 0.184 (d) 0.0184
17. 17.8.5 × 1.1 — where does the decimal point go? (a) 0.935 (b) 9.35 (c) 0.0935 (d) 93.5
18. 18.0.31 × 9 — where does the decimal point go? (a) 2.79 (b) 0.0279 (c) 0.279 (d) 27.9
19. 19.2.1 × 2.4 — where does the decimal point go? (a) 5.04 (b) 0.0504 (c) 0.504 (d) 50.4
20. 20.0.96 × 37 — where does the decimal point go? (a) 3.552 (b) 35.52 (c) 0.3552 (d) 355.2
21. 21.0.23 × 16 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 0.368 (d) 0.0368
22. 22.0.61 × 33 — where does the decimal point go? (a) 20.13 (b) 0.2013 (c) 201.3 (d) 2.013
23. 23.7.7 × 22 — where does the decimal point go? (a) 169.4 (b) 1.694 (c) 1694 (d) 16.94
24. 24.0.72 × 28 — where does the decimal point go? (a) 201.6 (b) 20.16 (c) 0.2016 (d) 2.016
25. 25.0.93 × 0.6 — where does the decimal point go? (a) 0.558 (b) 0.0558 (c) 5.58 (d) 0.00558
26. 26.4.3 × 23 — where does the decimal point go? (a) 9.89 (b) 98.9 (c) 0.989 (d) 989
27. 27.0.36 × 21 — where does the decimal point go? (a) 75.6 (b) 0.0756 (c) 7.56 (d) 0.756
28. 28.1.7 × 3 — where does the decimal point go? (a) 51 (b) 0.51 (c) 5.1 (d) 0.051
29. 29.5.9 × 0.7 — where does the decimal point go? (a) 41.3 (b) 0.413 (c) 4.13 (d) 0.0413
30. 30.0.72 × 21 — where does the decimal point go? (a) 0.1512 (b) 1.512 (c) 151.2 (d) 15.12
31. 31.6.2 × 31 — where does the decimal point go? (a) 192.2 (b) 1.922 (c) 1922 (d) 19.22
32. 32.0.28 × 4 — where does the decimal point go? (a) 11.2 (b) 0.112 (c) 1.12 (d) 0.0112
33. 33.5.7 × 32 — where does the decimal point go? (a) 1824 (b) 182.4 (c) 18.24 (d) 1.824
34. 34.0.33 × 6 — where does the decimal point go? (a) 19.8 (b) 1.98 (c) 0.198 (d) 0.0198
35. 35.0.78 × 8 — where does the decimal point go? (a) 62.4 (b) 0.624 (c) 0.0624 (d) 6.24
36. 36.9.1 × 1.5 — where does the decimal point go? (a) 136.5 (b) 0.1365 (c) 13.65 (d) 1.365
37. 37.0.49 × 3.9 — where does the decimal point go? (a) 1.911 (b) 0.1911 (c) 0.01911 (d) 19.11
38. 38.3.3 × 8 — where does the decimal point go? (a) 264 (b) 2.64 (c) 0.264 (d) 26.4
39. 39.7.6 × 0.2 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 0.0152 (d) 15.2
40. 40.0.12 × 0.4 — where does the decimal point go? (a) 0.48 (b) 0.048 (c) 0.0048 (d) 0.00048

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