Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 618 · 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 × 19 — where does the decimal point go? (a) 0.0798 (b) 0.798 (c) 79.8 (d) 7.98
2. 2.0.22 × 0.6 — where does the decimal point go? (a) 1.32 (b) 0.0132 (c) 0.00132 (d) 0.132
3. 3.0.43 × 3 — where does the decimal point go? (a) 0.129 (b) 1.29 (c) 0.0129 (d) 12.9
4. 4.0.82 × 0.4 — where does the decimal point go? (a) 0.328 (b) 3.28 (c) 0.0328 (d) 0.00328
5. 5.0.91 × 7 — where does the decimal point go? (a) 63.7 (b) 6.37 (c) 0.0637 (d) 0.637
6. 6.0.42 × 39 — where does the decimal point go? (a) 1.638 (b) 16.38 (c) 163.8 (d) 0.1638
7. 7.2.3 × 0.8 — where does the decimal point go? (a) 1.84 (b) 18.4 (c) 0.184 (d) 0.0184
8. 8.0.99 × 0.4 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 0.0396 (d) 0.00396
9. 9.0.52 × 3 — where does the decimal point go? (a) 15.6 (b) 0.0156 (c) 1.56 (d) 0.156
10. 10.1.6 × 29 — where does the decimal point go? (a) 4.64 (b) 0.464 (c) 464 (d) 46.4
11. 11.8.9 × 19 — where does the decimal point go? (a) 16.91 (b) 169.1 (c) 1691 (d) 1.691
12. 12.0.89 × 2 — where does the decimal point go? (a) 1.78 (b) 17.8 (c) 0.178 (d) 0.0178
13. 13.0.17 × 4 — where does the decimal point go? (a) 0.0068 (b) 0.68 (c) 0.068 (d) 6.8
14. 14.0.67 × 0.9 — where does the decimal point go? (a) 0.00603 (b) 6.03 (c) 0.603 (d) 0.0603
15. 15.8.7 × 7 — where does the decimal point go? (a) 0.609 (b) 609 (c) 6.09 (d) 60.9
16. 16.0.63 × 0.9 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 0.0567 (d) 0.00567
17. 17.0.28 × 6 — where does the decimal point go? (a) 1.68 (b) 16.8 (c) 0.0168 (d) 0.168
18. 18.5.3 × 2.7 — where does the decimal point go? (a) 0.1431 (b) 14.31 (c) 143.1 (d) 1.431
19. 19.5.1 × 6 — where does the decimal point go? (a) 30.6 (b) 306 (c) 3.06 (d) 0.306
20. 20.6.2 × 3.1 — where does the decimal point go? (a) 1.922 (b) 19.22 (c) 192.2 (d) 0.1922
21. 21.7.2 × 0.2 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 1.44 (d) 14.4
22. 22.9.2 × 0.2 — where does the decimal point go? (a) 18.4 (b) 1.84 (c) 0.0184 (d) 0.184
23. 23.0.83 × 0.9 — where does the decimal point go? (a) 7.47 (b) 0.747 (c) 0.00747 (d) 0.0747
24. 24.5.9 × 1.9 — where does the decimal point go? (a) 1.121 (b) 11.21 (c) 112.1 (d) 0.1121
25. 25.0.91 × 4.8 — where does the decimal point go? (a) 0.04368 (b) 0.4368 (c) 43.68 (d) 4.368
26. 26.5.9 × 7 — where does the decimal point go? (a) 41.3 (b) 4.13 (c) 413 (d) 0.413
27. 27.8.4 × 26 — where does the decimal point go? (a) 2.184 (b) 2184 (c) 218.4 (d) 21.84
28. 28.2.7 × 7 — where does the decimal point go? (a) 1.89 (b) 189 (c) 0.189 (d) 18.9
29. 29.9.9 × 0.4 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 39.6 (d) 0.0396
30. 30.0.95 × 0.7 — where does the decimal point go? (a) 0.665 (b) 6.65 (c) 0.00665 (d) 0.0665
31. 31.0.63 × 4.9 — where does the decimal point go? (a) 3.087 (b) 0.03087 (c) 30.87 (d) 0.3087
32. 32.0.96 × 17 — where does the decimal point go? (a) 1.632 (b) 163.2 (c) 16.32 (d) 0.1632
33. 33.0.67 × 0.6 — where does the decimal point go? (a) 4.02 (b) 0.0402 (c) 0.402 (d) 0.00402
34. 34.0.44 × 0.2 — where does the decimal point go? (a) 0.0088 (b) 0.00088 (c) 0.88 (d) 0.088
35. 35.0.98 × 7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 0.0686 (d) 68.6
36. 36.9.4 × 29 — where does the decimal point go? (a) 27.26 (b) 2.726 (c) 272.6 (d) 2726
37. 37.1.8 × 23 — where does the decimal point go? (a) 4.14 (b) 414 (c) 41.4 (d) 0.414
38. 38.8.5 × 4.1 — where does the decimal point go? (a) 3.485 (b) 348.5 (c) 0.3485 (d) 34.85
39. 39.0.14 × 2.6 — where does the decimal point go? (a) 0.0364 (b) 3.64 (c) 0.00364 (d) 0.364
40. 40.9.1 × 6 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 54.6 (d) 546

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