Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 423 · 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. 1.0.39 × 25 — where does the decimal point go? (a) 9.75 (b) 0.975 (c) 0.0975 (d) 97.5
2. 2.2.7 × 16 — where does the decimal point go? (a) 432 (b) 4.32 (c) 43.2 (d) 0.432
3. 3.6.7 × 0.7 — where does the decimal point go? (a) 0.469 (b) 4.69 (c) 0.0469 (d) 46.9
4. 4.0.13 × 2.4 — where does the decimal point go? (a) 3.12 (b) 0.00312 (c) 0.312 (d) 0.0312
5. 5.1.2 × 7 — where does the decimal point go? (a) 0.084 (b) 84 (c) 8.4 (d) 0.84
6. 6.7.3 × 48 — where does the decimal point go? (a) 3504 (b) 3.504 (c) 35.04 (d) 350.4
7. 7.0.22 × 0.6 — where does the decimal point go? (a) 0.00132 (b) 0.0132 (c) 1.32 (d) 0.132
8. 8.4.6 × 6 — where does the decimal point go? (a) 0.276 (b) 2.76 (c) 27.6 (d) 276
9. 9.0.19 × 6 — where does the decimal point go? (a) 0.114 (b) 11.4 (c) 1.14 (d) 0.0114
10. 10.2.3 × 13 — where does the decimal point go? (a) 0.299 (b) 2.99 (c) 299 (d) 29.9
11. 11.3.1 × 1.2 — where does the decimal point go? (a) 3.72 (b) 0.0372 (c) 37.2 (d) 0.372
12. 12.0.81 × 0.8 — where does the decimal point go? (a) 0.0648 (b) 6.48 (c) 0.648 (d) 0.00648
13. 13.7.3 × 4.4 — where does the decimal point go? (a) 0.3212 (b) 32.12 (c) 321.2 (d) 3.212
14. 14.4.8 × 47 — where does the decimal point go? (a) 22.56 (b) 225.6 (c) 2256 (d) 2.256
15. 15.0.93 × 3 — where does the decimal point go? (a) 2.79 (b) 0.0279 (c) 27.9 (d) 0.279
16. 16.3.1 × 3.5 — where does the decimal point go? (a) 10.85 (b) 0.1085 (c) 1.085 (d) 108.5
17. 17.2.2 × 8 — where does the decimal point go? (a) 1.76 (b) 17.6 (c) 0.176 (d) 176
18. 18.4.5 × 33 — where does the decimal point go? (a) 1.485 (b) 148.5 (c) 1485 (d) 14.85
19. 19.3.3 × 2 — where does the decimal point go? (a) 0.66 (b) 66 (c) 0.066 (d) 6.6
20. 20.9.2 × 6 — where does the decimal point go? (a) 0.552 (b) 55.2 (c) 5.52 (d) 552
21. 21.9.7 × 28 — where does the decimal point go? (a) 2716 (b) 27.16 (c) 2.716 (d) 271.6
22. 22.0.83 × 0.2 — where does the decimal point go? (a) 0.166 (b) 0.0166 (c) 0.00166 (d) 1.66
23. 23.7.3 × 4 — where does the decimal point go? (a) 0.292 (b) 292 (c) 29.2 (d) 2.92
24. 24.0.54 × 0.7 — where does the decimal point go? (a) 3.78 (b) 0.378 (c) 0.0378 (d) 0.00378
25. 25.3.3 × 2.8 — where does the decimal point go? (a) 9.24 (b) 92.4 (c) 0.924 (d) 0.0924
26. 26.8.6 × 4 — where does the decimal point go? (a) 344 (b) 0.344 (c) 34.4 (d) 3.44
27. 27.0.24 × 9 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 0.0216
28. 28.9.6 × 1.9 — where does the decimal point go? (a) 1.824 (b) 182.4 (c) 18.24 (d) 0.1824
29. 29.4.6 × 0.3 — where does the decimal point go? (a) 1.38 (b) 0.0138 (c) 0.138 (d) 13.8
30. 30.6.6 × 48 — where does the decimal point go? (a) 31.68 (b) 316.8 (c) 3168 (d) 3.168
31. 31.0.27 × 0.5 — where does the decimal point go? (a) 1.35 (b) 0.0135 (c) 0.00135 (d) 0.135
32. 32.0.21 × 0.7 — where does the decimal point go? (a) 0.147 (b) 0.00147 (c) 0.0147 (d) 1.47
33. 33.5.8 × 43 — where does the decimal point go? (a) 249.4 (b) 24.94 (c) 2.494 (d) 2494
34. 34.0.68 × 21 — where does the decimal point go? (a) 1.428 (b) 0.1428 (c) 142.8 (d) 14.28
35. 35.4.1 × 12 — where does the decimal point go? (a) 4.92 (b) 49.2 (c) 0.492 (d) 492
36. 36.0.79 × 25 — where does the decimal point go? (a) 19.75 (b) 0.1975 (c) 197.5 (d) 1.975
37. 37.0.67 × 0.4 — where does the decimal point go? (a) 2.68 (b) 0.0268 (c) 0.268 (d) 0.00268
38. 38.0.64 × 3 — where does the decimal point go? (a) 0.192 (b) 1.92 (c) 0.0192 (d) 19.2
39. 39.0.33 × 0.7 — where does the decimal point go? (a) 0.00231 (b) 0.231 (c) 0.0231 (d) 2.31
40. 40.8.3 × 2 — where does the decimal point go? (a) 0.166 (b) 1.66 (c) 16.6 (d) 166

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