Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 107 · 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. 1.0.42 × 1.4 — where does the decimal point go? (a) 0.588 (b) 5.88 (c) 0.0588 (d) 0.00588
2. 2.1.4 × 0.4 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
3. 3.2.3 × 18 — where does the decimal point go? (a) 414 (b) 4.14 (c) 0.414 (d) 41.4
4. 4.9.9 × 48 — where does the decimal point go? (a) 4.752 (b) 475.2 (c) 4752 (d) 47.52
5. 5.0.64 × 49 — where does the decimal point go? (a) 313.6 (b) 0.3136 (c) 31.36 (d) 3.136
6. 6.6.8 × 7 — where does the decimal point go? (a) 4.76 (b) 476 (c) 0.476 (d) 47.6
7. 7.9.3 × 0.7 — where does the decimal point go? (a) 0.0651 (b) 65.1 (c) 0.651 (d) 6.51
8. 8.0.68 × 4.1 — where does the decimal point go? (a) 27.88 (b) 2.788 (c) 0.2788 (d) 0.02788
9. 9.0.61 × 21 — where does the decimal point go? (a) 0.1281 (b) 128.1 (c) 1.281 (d) 12.81
10. 10.8.4 × 2.7 — where does the decimal point go? (a) 0.2268 (b) 2.268 (c) 226.8 (d) 22.68
11. 11.1.9 × 13 — where does the decimal point go? (a) 0.247 (b) 24.7 (c) 247 (d) 2.47
12. 12.0.12 × 3.4 — where does the decimal point go? (a) 4.08 (b) 0.0408 (c) 0.00408 (d) 0.408
13. 13.7.7 × 3.4 — where does the decimal point go? (a) 26.18 (b) 261.8 (c) 0.2618 (d) 2.618
14. 14.1.3 × 0.9 — where does the decimal point go? (a) 11.7 (b) 0.0117 (c) 1.17 (d) 0.117
15. 15.0.77 × 15 — where does the decimal point go? (a) 115.5 (b) 0.1155 (c) 11.55 (d) 1.155
16. 16.1.8 × 33 — where does the decimal point go? (a) 59.4 (b) 594 (c) 0.594 (d) 5.94
17. 17.1.2 × 9 — where does the decimal point go? (a) 108 (b) 0.108 (c) 10.8 (d) 1.08
18. 18.2.5 × 25 — where does the decimal point go? (a) 625 (b) 62.5 (c) 6.25 (d) 0.625
19. 19.6.1 × 1.8 — where does the decimal point go? (a) 109.8 (b) 10.98 (c) 1.098 (d) 0.1098
20. 20.5.2 × 4.9 — where does the decimal point go? (a) 2.548 (b) 25.48 (c) 0.2548 (d) 254.8
21. 21.1.4 × 4.7 — where does the decimal point go? (a) 0.0658 (b) 0.658 (c) 65.8 (d) 6.58
22. 22.0.45 × 5 — where does the decimal point go? (a) 2.25 (b) 22.5 (c) 0.225 (d) 0.0225
23. 23.0.15 × 2.3 — where does the decimal point go? (a) 0.345 (b) 3.45 (c) 0.0345 (d) 0.00345
24. 24.0.57 × 2 — where does the decimal point go? (a) 11.4 (b) 0.114 (c) 1.14 (d) 0.0114
25. 25.0.42 × 2 — where does the decimal point go? (a) 0.0084 (b) 8.4 (c) 0.084 (d) 0.84
26. 26.0.99 × 2 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 0.0198 (d) 19.8
27. 27.8.9 × 27 — where does the decimal point go? (a) 2.403 (b) 24.03 (c) 2403 (d) 240.3
28. 28.6.6 × 12 — where does the decimal point go? (a) 792 (b) 79.2 (c) 7.92 (d) 0.792
29. 29.0.53 × 0.3 — where does the decimal point go? (a) 0.0159 (b) 1.59 (c) 0.00159 (d) 0.159
30. 30.4.2 × 49 — where does the decimal point go? (a) 20.58 (b) 2.058 (c) 205.8 (d) 2058
31. 31.0.46 × 4.1 — where does the decimal point go? (a) 0.1886 (b) 1.886 (c) 18.86 (d) 0.01886
32. 32.0.72 × 0.7 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 5.04 (d) 0.00504
33. 33.7.8 × 26 — where does the decimal point go? (a) 20.28 (b) 2028 (c) 202.8 (d) 2.028
34. 34.2.1 × 29 — where does the decimal point go? (a) 0.609 (b) 6.09 (c) 60.9 (d) 609
35. 35.0.32 × 3.8 — where does the decimal point go? (a) 12.16 (b) 0.1216 (c) 1.216 (d) 0.01216
36. 36.0.41 × 14 — where does the decimal point go? (a) 0.574 (b) 57.4 (c) 5.74 (d) 0.0574
37. 37.0.79 × 15 — where does the decimal point go? (a) 1.185 (b) 0.1185 (c) 11.85 (d) 118.5
38. 38.7.2 × 2.9 — where does the decimal point go? (a) 0.2088 (b) 2.088 (c) 20.88 (d) 208.8
39. 39.3.4 × 3 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 10.2 (d) 102
40. 40.0.58 × 3 — where does the decimal point go? (a) 0.0174 (b) 1.74 (c) 0.174 (d) 17.4

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