Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 823 · 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. 1.0.16 × 7 — where does the decimal point go? (a) 1.12 (b) 11.2 (c) 0.112 (d) 0.0112
2. 2.7.4 × 0.3 — where does the decimal point go? (a) 2.22 (b) 0.222 (c) 22.2 (d) 0.0222
3. 3.3.1 × 13 — where does the decimal point go? (a) 403 (b) 40.3 (c) 4.03 (d) 0.403
4. 4.0.76 × 2.7 — where does the decimal point go? (a) 20.52 (b) 0.02052 (c) 2.052 (d) 0.2052
5. 5.3.1 × 0.9 — where does the decimal point go? (a) 2.79 (b) 0.279 (c) 27.9 (d) 0.0279
6. 6.7.2 × 7 — where does the decimal point go? (a) 504 (b) 0.504 (c) 5.04 (d) 50.4
7. 7.2.5 × 0.9 — where does the decimal point go? (a) 0.0225 (b) 2.25 (c) 0.225 (d) 22.5
8. 8.0.73 × 25 — where does the decimal point go? (a) 18.25 (b) 182.5 (c) 0.1825 (d) 1.825
9. 9.0.48 × 3.9 — where does the decimal point go? (a) 1.872 (b) 0.01872 (c) 18.72 (d) 0.1872
10. 10.8.7 × 0.7 — where does the decimal point go? (a) 0.609 (b) 6.09 (c) 0.0609 (d) 60.9
11. 11.4.7 × 21 — where does the decimal point go? (a) 98.7 (b) 9.87 (c) 0.987 (d) 987
12. 12.8.9 × 35 — where does the decimal point go? (a) 311.5 (b) 31.15 (c) 3115 (d) 3.115
13. 13.7.1 × 0.7 — where does the decimal point go? (a) 4.97 (b) 49.7 (c) 0.497 (d) 0.0497
14. 14.1.3 × 2 — where does the decimal point go? (a) 0.26 (b) 0.026 (c) 26 (d) 2.6
15. 15.8.8 × 18 — where does the decimal point go? (a) 15.84 (b) 1.584 (c) 1584 (d) 158.4
16. 16.8.2 × 46 — where does the decimal point go? (a) 37.72 (b) 3.772 (c) 377.2 (d) 3772
17. 17.0.93 × 46 — where does the decimal point go? (a) 42.78 (b) 4.278 (c) 0.4278 (d) 427.8
18. 18.0.61 × 0.3 — where does the decimal point go? (a) 1.83 (b) 0.00183 (c) 0.0183 (d) 0.183
19. 19.4.6 × 37 — where does the decimal point go? (a) 1.702 (b) 1702 (c) 17.02 (d) 170.2
20. 20.3.5 × 2.3 — where does the decimal point go? (a) 80.5 (b) 0.805 (c) 8.05 (d) 0.0805
21. 21.3.2 × 2 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 64 (d) 6.4
22. 22.8.9 × 0.8 — where does the decimal point go? (a) 0.0712 (b) 0.712 (c) 71.2 (d) 7.12
23. 23.7.6 × 3.3 — where does the decimal point go? (a) 2.508 (b) 25.08 (c) 0.2508 (d) 250.8
24. 24.1.2 × 3.3 — where does the decimal point go? (a) 39.6 (b) 0.396 (c) 0.0396 (d) 3.96
25. 25.3.8 × 49 — where does the decimal point go? (a) 186.2 (b) 18.62 (c) 1.862 (d) 1862
26. 26.0.86 × 29 — where does the decimal point go? (a) 2.494 (b) 0.2494 (c) 24.94 (d) 249.4
27. 27.0.84 × 0.3 — where does the decimal point go? (a) 0.00252 (b) 0.0252 (c) 0.252 (d) 2.52
28. 28.8.3 × 8 — where does the decimal point go? (a) 66.4 (b) 6.64 (c) 0.664 (d) 664
29. 29.1.3 × 0.7 — where does the decimal point go? (a) 0.0091 (b) 9.1 (c) 0.091 (d) 0.91
30. 30.2.6 × 7 — where does the decimal point go? (a) 1.82 (b) 182 (c) 18.2 (d) 0.182
31. 31.0.89 × 13 — where does the decimal point go? (a) 0.1157 (b) 1.157 (c) 115.7 (d) 11.57
32. 32.0.24 × 0.3 — where does the decimal point go? (a) 0.072 (b) 0.00072 (c) 0.72 (d) 0.0072
33. 33.0.37 × 5 — where does the decimal point go? (a) 1.85 (b) 0.0185 (c) 0.185 (d) 18.5
34. 34.4.2 × 0.9 — where does the decimal point go? (a) 0.378 (b) 0.0378 (c) 3.78 (d) 37.8
35. 35.8.4 × 0.4 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 33.6
36. 36.5.1 × 6 — where does the decimal point go? (a) 30.6 (b) 0.306 (c) 306 (d) 3.06
37. 37.0.19 × 31 — where does the decimal point go? (a) 58.9 (b) 5.89 (c) 0.0589 (d) 0.589
38. 38.3.7 × 33 — where does the decimal point go? (a) 1221 (b) 12.21 (c) 122.1 (d) 1.221
39. 39.6.7 × 35 — where does the decimal point go? (a) 2345 (b) 234.5 (c) 2.345 (d) 23.45
40. 40.0.55 × 45 — where does the decimal point go? (a) 2.475 (b) 24.75 (c) 0.2475 (d) 247.5

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