Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 187 · 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. 1.5.5 × 39 — where does the decimal point go? (a) 2145 (b) 2.145 (c) 214.5 (d) 21.45
2. 2.6.1 × 5 — where does the decimal point go? (a) 0.305 (b) 305 (c) 3.05 (d) 30.5
3. 3.3.6 × 4.7 — where does the decimal point go? (a) 1.692 (b) 169.2 (c) 16.92 (d) 0.1692
4. 4.8.4 × 3.8 — where does the decimal point go? (a) 31.92 (b) 319.2 (c) 3.192 (d) 0.3192
5. 5.0.33 × 2.8 — where does the decimal point go? (a) 0.00924 (b) 0.924 (c) 0.0924 (d) 9.24
6. 6.2.9 × 3.7 — where does the decimal point go? (a) 107.3 (b) 10.73 (c) 1.073 (d) 0.1073
7. 7.5.3 × 3 — where does the decimal point go? (a) 15.9 (b) 0.159 (c) 1.59 (d) 159
8. 8.0.81 × 1.5 — where does the decimal point go? (a) 0.1215 (b) 1.215 (c) 12.15 (d) 0.01215
9. 9.4.3 × 3 — where does the decimal point go? (a) 0.129 (b) 1.29 (c) 12.9 (d) 129
10. 10.7.1 × 7 — where does the decimal point go? (a) 0.497 (b) 4.97 (c) 497 (d) 49.7
11. 11.0.39 × 5 — where does the decimal point go? (a) 19.5 (b) 0.0195 (c) 1.95 (d) 0.195
12. 12.3.5 × 0.9 — where does the decimal point go? (a) 0.0315 (b) 0.315 (c) 31.5 (d) 3.15
13. 13.4.9 × 4.5 — where does the decimal point go? (a) 2.205 (b) 0.2205 (c) 22.05 (d) 220.5
14. 14.0.48 × 49 — where does the decimal point go? (a) 0.2352 (b) 235.2 (c) 2.352 (d) 23.52
15. 15.0.34 × 3.4 — where does the decimal point go? (a) 0.01156 (b) 1.156 (c) 0.1156 (d) 11.56
16. 16.0.52 × 14 — where does the decimal point go? (a) 0.728 (b) 0.0728 (c) 7.28 (d) 72.8
17. 17.0.61 × 0.4 — where does the decimal point go? (a) 2.44 (b) 0.00244 (c) 0.244 (d) 0.0244
18. 18.0.24 × 33 — where does the decimal point go? (a) 0.0792 (b) 79.2 (c) 7.92 (d) 0.792
19. 19.5.3 × 0.5 — where does the decimal point go? (a) 2.65 (b) 0.265 (c) 0.0265 (d) 26.5
20. 20.0.69 × 1.7 — where does the decimal point go? (a) 11.73 (b) 1.173 (c) 0.01173 (d) 0.1173
21. 21.0.27 × 4.8 — where does the decimal point go? (a) 1.296 (b) 12.96 (c) 0.01296 (d) 0.1296
22. 22.7.7 × 0.7 — where does the decimal point go? (a) 5.39 (b) 53.9 (c) 0.539 (d) 0.0539
23. 23.0.97 × 41 — where does the decimal point go? (a) 0.3977 (b) 3.977 (c) 39.77 (d) 397.7
24. 24.9.6 × 3 — where does the decimal point go? (a) 0.288 (b) 288 (c) 2.88 (d) 28.8
25. 25.0.94 × 4 — where does the decimal point go? (a) 0.0376 (b) 0.376 (c) 3.76 (d) 37.6
26. 26.1.8 × 48 — where does the decimal point go? (a) 0.864 (b) 86.4 (c) 8.64 (d) 864
27. 27.0.53 × 0.5 — where does the decimal point go? (a) 0.265 (b) 0.00265 (c) 0.0265 (d) 2.65
28. 28.5.6 × 0.3 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 1.68 (d) 16.8
29. 29.5.7 × 3 — where does the decimal point go? (a) 171 (b) 1.71 (c) 17.1 (d) 0.171
30. 30.7.4 × 32 — where does the decimal point go? (a) 2368 (b) 23.68 (c) 236.8 (d) 2.368
31. 31.8.1 × 46 — where does the decimal point go? (a) 3726 (b) 3.726 (c) 37.26 (d) 372.6
32. 32.2.4 × 18 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 4.32 (d) 432
33. 33.2.6 × 21 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 546 (d) 54.6
34. 34.0.17 × 3 — where does the decimal point go? (a) 0.051 (b) 0.51 (c) 0.0051 (d) 5.1
35. 35.5.1 × 0.2 — where does the decimal point go? (a) 0.0102 (b) 0.102 (c) 1.02 (d) 10.2
36. 36.2.2 × 14 — where does the decimal point go? (a) 308 (b) 30.8 (c) 3.08 (d) 0.308
37. 37.0.46 × 2.6 — where does the decimal point go? (a) 0.1196 (b) 11.96 (c) 1.196 (d) 0.01196
38. 38.7.6 × 29 — where does the decimal point go? (a) 2204 (b) 22.04 (c) 2.204 (d) 220.4
39. 39.8.4 × 12 — where does the decimal point go? (a) 10.08 (b) 100.8 (c) 1008 (d) 1.008
40. 40.0.41 × 0.6 — where does the decimal point go? (a) 0.246 (b) 0.0246 (c) 2.46 (d) 0.00246

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