Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 595 · 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. 1.0.55 × 3 — where does the decimal point go? (a) 0.0165 (b) 0.165 (c) 1.65 (d) 16.5
2. 2.3.4 × 11 — where does the decimal point go? (a) 0.374 (b) 374 (c) 37.4 (d) 3.74
3. 3.8.7 × 1.7 — where does the decimal point go? (a) 0.1479 (b) 147.9 (c) 14.79 (d) 1.479
4. 4.0.66 × 0.3 — where does the decimal point go? (a) 0.0198 (b) 0.198 (c) 1.98 (d) 0.00198
5. 5.0.13 × 0.3 — where does the decimal point go? (a) 0.00039 (b) 0.0039 (c) 0.039 (d) 0.39
6. 6.0.42 × 0.3 — where does the decimal point go? (a) 0.0126 (b) 1.26 (c) 0.126 (d) 0.00126
7. 7.0.42 × 2 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 8.4 (d) 0.084
8. 8.0.19 × 0.9 — where does the decimal point go? (a) 0.0171 (b) 0.00171 (c) 1.71 (d) 0.171
9. 9.3.1 × 4.6 — where does the decimal point go? (a) 1.426 (b) 142.6 (c) 14.26 (d) 0.1426
10. 10.1.6 × 4 — where does the decimal point go? (a) 6.4 (b) 64 (c) 0.064 (d) 0.64
11. 11.9.1 × 1.7 — where does the decimal point go? (a) 0.1547 (b) 15.47 (c) 1.547 (d) 154.7
12. 12.2.4 × 9 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 216 (d) 21.6
13. 13.6.7 × 1.8 — where does the decimal point go? (a) 12.06 (b) 0.1206 (c) 1.206 (d) 120.6
14. 14.4.6 × 9 — where does the decimal point go? (a) 0.414 (b) 4.14 (c) 41.4 (d) 414
15. 15.0.37 × 16 — where does the decimal point go? (a) 0.592 (b) 59.2 (c) 5.92 (d) 0.0592
16. 16.0.16 × 11 — where does the decimal point go? (a) 0.0176 (b) 0.176 (c) 17.6 (d) 1.76
17. 17.5.8 × 0.6 — where does the decimal point go? (a) 0.0348 (b) 3.48 (c) 0.348 (d) 34.8
18. 18.3.2 × 0.9 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 2.88 (d) 0.0288
19. 19.5.5 × 3 — where does the decimal point go? (a) 16.5 (b) 0.165 (c) 1.65 (d) 165
20. 20.0.98 × 9 — where does the decimal point go? (a) 0.882 (b) 8.82 (c) 0.0882 (d) 88.2
21. 21.0.12 × 7 — where does the decimal point go? (a) 0.084 (b) 8.4 (c) 0.84 (d) 0.0084
22. 22.0.98 × 2 — where does the decimal point go? (a) 0.0196 (b) 0.196 (c) 19.6 (d) 1.96
23. 23.0.93 × 6 — where does the decimal point go? (a) 55.8 (b) 0.0558 (c) 5.58 (d) 0.558
24. 24.0.34 × 13 — where does the decimal point go? (a) 0.0442 (b) 0.442 (c) 44.2 (d) 4.42
25. 25.0.45 × 47 — where does the decimal point go? (a) 2.115 (b) 211.5 (c) 0.2115 (d) 21.15
26. 26.2.6 × 3 — where does the decimal point go? (a) 78 (b) 0.78 (c) 0.078 (d) 7.8
27. 27.2.1 × 0.8 — where does the decimal point go? (a) 0.0168 (b) 1.68 (c) 0.168 (d) 16.8
28. 28.8.2 × 37 — where does the decimal point go? (a) 3.034 (b) 303.4 (c) 30.34 (d) 3034
29. 29.7.6 × 4 — where does the decimal point go? (a) 0.304 (b) 304 (c) 30.4 (d) 3.04
30. 30.4.6 × 0.7 — where does the decimal point go? (a) 3.22 (b) 0.0322 (c) 0.322 (d) 32.2
31. 31.0.18 × 37 — where does the decimal point go? (a) 0.666 (b) 6.66 (c) 0.0666 (d) 66.6
32. 32.0.83 × 2.3 — where does the decimal point go? (a) 1.909 (b) 0.01909 (c) 19.09 (d) 0.1909
33. 33.2.4 × 3.3 — where does the decimal point go? (a) 0.792 (b) 7.92 (c) 0.0792 (d) 79.2
34. 34.3.2 × 0.7 — where does the decimal point go? (a) 0.0224 (b) 0.224 (c) 22.4 (d) 2.24
35. 35.1.9 × 7 — where does the decimal point go? (a) 0.133 (b) 13.3 (c) 1.33 (d) 133
36. 36.0.16 × 0.4 — where does the decimal point go? (a) 0.64 (b) 0.0064 (c) 0.064 (d) 0.00064
37. 37.0.42 × 2.1 — where does the decimal point go? (a) 8.82 (b) 0.00882 (c) 0.0882 (d) 0.882
38. 38.8.6 × 49 — where does the decimal point go? (a) 4.214 (b) 421.4 (c) 4214 (d) 42.14
39. 39.1.3 × 4 — where does the decimal point go? (a) 5.2 (b) 52 (c) 0.052 (d) 0.52
40. 40.9.9 × 0.9 — where does the decimal point go? (a) 0.0891 (b) 89.1 (c) 0.891 (d) 8.91

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