Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 859 · 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. 1.8.3 × 3.6 — where does the decimal point go? (a) 29.88 (b) 2.988 (c) 298.8 (d) 0.2988
2. 2.8.3 × 5 — where does the decimal point go? (a) 41.5 (b) 0.415 (c) 415 (d) 4.15
3. 3.8.8 × 3.9 — where does the decimal point go? (a) 0.3432 (b) 343.2 (c) 34.32 (d) 3.432
4. 4.1.5 × 7 — where does the decimal point go? (a) 105 (b) 10.5 (c) 0.105 (d) 1.05
5. 5.7.7 × 4 — where does the decimal point go? (a) 0.308 (b) 3.08 (c) 308 (d) 30.8
6. 6.9.7 × 4.9 — where does the decimal point go? (a) 0.4753 (b) 4.753 (c) 475.3 (d) 47.53
7. 7.1.2 × 0.2 — where does the decimal point go? (a) 0.024 (b) 0.24 (c) 0.0024 (d) 2.4
8. 8.7.3 × 3 — where does the decimal point go? (a) 21.9 (b) 2.19 (c) 0.219 (d) 219
9. 9.5.4 × 7 — where does the decimal point go? (a) 37.8 (b) 3.78 (c) 378 (d) 0.378
10. 10.4.8 × 2 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 96 (d) 9.6
11. 11.0.94 × 0.4 — where does the decimal point go? (a) 0.00376 (b) 0.0376 (c) 3.76 (d) 0.376
12. 12.7.8 × 43 — where does the decimal point go? (a) 3354 (b) 335.4 (c) 3.354 (d) 33.54
13. 13.0.92 × 0.3 — where does the decimal point go? (a) 0.276 (b) 0.00276 (c) 0.0276 (d) 2.76
14. 14.5.3 × 3 — where does the decimal point go? (a) 159 (b) 1.59 (c) 15.9 (d) 0.159
15. 15.0.18 × 0.8 — where does the decimal point go? (a) 1.44 (b) 0.0144 (c) 0.00144 (d) 0.144
16. 16.8.6 × 28 — where does the decimal point go? (a) 24.08 (b) 240.8 (c) 2.408 (d) 2408
17. 17.0.66 × 31 — where does the decimal point go? (a) 204.6 (b) 0.2046 (c) 20.46 (d) 2.046
18. 18.0.34 × 0.3 — where does the decimal point go? (a) 0.0102 (b) 0.102 (c) 1.02 (d) 0.00102
19. 19.2.5 × 7 — where does the decimal point go? (a) 0.175 (b) 175 (c) 1.75 (d) 17.5
20. 20.0.48 × 7 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 0.0336 (d) 33.6
21. 21.0.39 × 12 — where does the decimal point go? (a) 0.0468 (b) 46.8 (c) 0.468 (d) 4.68
22. 22.6.4 × 6 — where does the decimal point go? (a) 384 (b) 0.384 (c) 3.84 (d) 38.4
23. 23.4.9 × 6 — where does the decimal point go? (a) 294 (b) 2.94 (c) 0.294 (d) 29.4
24. 24.0.43 × 0.5 — where does the decimal point go? (a) 2.15 (b) 0.00215 (c) 0.215 (d) 0.0215
25. 25.7.1 × 2 — where does the decimal point go? (a) 142 (b) 0.142 (c) 1.42 (d) 14.2
26. 26.1.3 × 12 — where does the decimal point go? (a) 15.6 (b) 1.56 (c) 156 (d) 0.156
27. 27.0.58 × 1.7 — where does the decimal point go? (a) 0.986 (b) 9.86 (c) 0.0986 (d) 0.00986
28. 28.9.2 × 22 — where does the decimal point go? (a) 2.024 (b) 2024 (c) 20.24 (d) 202.4
29. 29.2.8 × 13 — where does the decimal point go? (a) 0.364 (b) 36.4 (c) 364 (d) 3.64
30. 30.1.3 × 6 — where does the decimal point go? (a) 0.78 (b) 0.078 (c) 78 (d) 7.8
31. 31.0.24 × 2 — where does the decimal point go? (a) 0.48 (b) 0.048 (c) 0.0048 (d) 4.8
32. 32.7.9 × 9 — where does the decimal point go? (a) 0.711 (b) 7.11 (c) 711 (d) 71.1
33. 33.8.1 × 1.4 — where does the decimal point go? (a) 1.134 (b) 11.34 (c) 113.4 (d) 0.1134
34. 34.0.91 × 0.2 — where does the decimal point go? (a) 0.182 (b) 1.82 (c) 0.00182 (d) 0.0182
35. 35.0.28 × 27 — where does the decimal point go? (a) 0.756 (b) 0.0756 (c) 7.56 (d) 75.6
36. 36.4.9 × 0.8 — where does the decimal point go? (a) 0.392 (b) 39.2 (c) 0.0392 (d) 3.92
37. 37.0.85 × 7 — where does the decimal point go? (a) 0.595 (b) 59.5 (c) 5.95 (d) 0.0595
38. 38.0.22 × 12 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 0.264 (d) 26.4
39. 39.7.7 × 3 — where does the decimal point go? (a) 23.1 (b) 0.231 (c) 2.31 (d) 231
40. 40.0.58 × 0.4 — where does the decimal point go? (a) 2.32 (b) 0.0232 (c) 0.232 (d) 0.00232

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