Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 121 · 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. 1.6.6 × 21 — where does the decimal point go? (a) 13.86 (b) 1.386 (c) 1386 (d) 138.6
2. 2.0.27 × 2.5 — where does the decimal point go? (a) 0.0675 (b) 0.675 (c) 6.75 (d) 0.00675
3. 3.0.42 × 8 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 33.6 (d) 3.36
4. 4.5.1 × 0.6 — where does the decimal point go? (a) 0.306 (b) 3.06 (c) 0.0306 (d) 30.6
5. 5.0.17 × 0.9 — where does the decimal point go? (a) 0.0153 (b) 0.00153 (c) 0.153 (d) 1.53
6. 6.0.94 × 13 — where does the decimal point go? (a) 0.1222 (b) 122.2 (c) 1.222 (d) 12.22
7. 7.5.1 × 4 — where does the decimal point go? (a) 0.204 (b) 20.4 (c) 204 (d) 2.04
8. 8.0.78 × 27 — where does the decimal point go? (a) 21.06 (b) 2.106 (c) 210.6 (d) 0.2106
9. 9.7.3 × 0.3 — where does the decimal point go? (a) 0.219 (b) 21.9 (c) 0.0219 (d) 2.19
10. 10.0.45 × 13 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 0.0585 (d) 58.5
11. 11.0.52 × 0.2 — where does the decimal point go? (a) 1.04 (b) 0.104 (c) 0.00104 (d) 0.0104
12. 12.2.4 × 4 — where does the decimal point go? (a) 9.6 (b) 96 (c) 0.096 (d) 0.96
13. 13.5.8 × 47 — where does the decimal point go? (a) 272.6 (b) 27.26 (c) 2.726 (d) 2726
14. 14.0.34 × 43 — where does the decimal point go? (a) 146.2 (b) 0.1462 (c) 1.462 (d) 14.62
15. 15.0.39 × 0.2 — where does the decimal point go? (a) 0.00078 (b) 0.0078 (c) 0.078 (d) 0.78
16. 16.7.4 × 4.7 — where does the decimal point go? (a) 347.8 (b) 3.478 (c) 0.3478 (d) 34.78
17. 17.1.3 × 46 — where does the decimal point go? (a) 598 (b) 0.598 (c) 5.98 (d) 59.8
18. 18.3.3 × 0.6 — where does the decimal point go? (a) 0.0198 (b) 19.8 (c) 1.98 (d) 0.198
19. 19.9.5 × 31 — where does the decimal point go? (a) 2.945 (b) 29.45 (c) 294.5 (d) 2945
20. 20.5.8 × 3 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 174 (d) 1.74
21. 21.0.65 × 3 — where does the decimal point go? (a) 1.95 (b) 0.0195 (c) 19.5 (d) 0.195
22. 22.0.78 × 3 — where does the decimal point go? (a) 2.34 (b) 23.4 (c) 0.234 (d) 0.0234
23. 23.1.3 × 1.5 — where does the decimal point go? (a) 1.95 (b) 0.195 (c) 0.0195 (d) 19.5
24. 24.2.4 × 23 — where does the decimal point go? (a) 552 (b) 5.52 (c) 0.552 (d) 55.2
25. 25.1.7 × 8 — where does the decimal point go? (a) 0.136 (b) 13.6 (c) 1.36 (d) 136
26. 26.7.9 × 8 — where does the decimal point go? (a) 632 (b) 63.2 (c) 0.632 (d) 6.32
27. 27.0.46 × 3.9 — where does the decimal point go? (a) 1.794 (b) 0.01794 (c) 17.94 (d) 0.1794
28. 28.0.41 × 4.6 — where does the decimal point go? (a) 18.86 (b) 1.886 (c) 0.01886 (d) 0.1886
29. 29.6.6 × 4.2 — where does the decimal point go? (a) 27.72 (b) 2.772 (c) 277.2 (d) 0.2772
30. 30.0.45 × 9 — where does the decimal point go? (a) 0.405 (b) 4.05 (c) 0.0405 (d) 40.5
31. 31.1.2 × 0.2 — where does the decimal point go? (a) 2.4 (b) 0.24 (c) 0.024 (d) 0.0024
32. 32.1.7 × 0.5 — where does the decimal point go? (a) 0.85 (b) 8.5 (c) 0.085 (d) 0.0085
33. 33.0.99 × 9 — where does the decimal point go? (a) 0.0891 (b) 8.91 (c) 0.891 (d) 89.1
34. 34.0.44 × 18 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 79.2 (d) 0.792
35. 35.9.3 × 0.9 — where does the decimal point go? (a) 8.37 (b) 83.7 (c) 0.0837 (d) 0.837
36. 36.9.1 × 4.3 — where does the decimal point go? (a) 391.3 (b) 3.913 (c) 39.13 (d) 0.3913
37. 37.0.33 × 0.4 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 0.0132 (d) 0.00132
38. 38.0.43 × 0.7 — where does the decimal point go? (a) 0.0301 (b) 0.00301 (c) 3.01 (d) 0.301
39. 39.2.7 × 2.7 — where does the decimal point go? (a) 0.0729 (b) 72.9 (c) 0.729 (d) 7.29
40. 40.0.64 × 3.8 — where does the decimal point go? (a) 0.02432 (b) 2.432 (c) 24.32 (d) 0.2432

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