Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 943 · 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. 1.0.49 × 0.5 — where does the decimal point go? (a) 0.00245 (b) 0.0245 (c) 0.245 (d) 2.45
2. 2.0.71 × 0.5 — where does the decimal point go? (a) 0.0355 (b) 3.55 (c) 0.00355 (d) 0.355
3. 3.3.2 × 0.2 — where does the decimal point go? (a) 6.4 (b) 0.0064 (c) 0.64 (d) 0.064
4. 4.9.7 × 9 — where does the decimal point go? (a) 8.73 (b) 87.3 (c) 873 (d) 0.873
5. 5.5.1 × 5 — where does the decimal point go? (a) 25.5 (b) 0.255 (c) 2.55 (d) 255
6. 6.0.73 × 8 — where does the decimal point go? (a) 5.84 (b) 58.4 (c) 0.584 (d) 0.0584
7. 7.3.2 × 8 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 25.6 (d) 256
8. 8.0.59 × 3 — where does the decimal point go? (a) 0.0177 (b) 17.7 (c) 0.177 (d) 1.77
9. 9.7.9 × 21 — where does the decimal point go? (a) 16.59 (b) 165.9 (c) 1.659 (d) 1659
10. 10.0.43 × 0.4 — where does the decimal point go? (a) 1.72 (b) 0.00172 (c) 0.172 (d) 0.0172
11. 11.4.7 × 0.2 — where does the decimal point go? (a) 9.4 (b) 0.94 (c) 0.0094 (d) 0.094
12. 12.0.86 × 46 — where does the decimal point go? (a) 395.6 (b) 0.3956 (c) 39.56 (d) 3.956
13. 13.0.22 × 41 — where does the decimal point go? (a) 90.2 (b) 9.02 (c) 0.0902 (d) 0.902
14. 14.7.3 × 0.9 — where does the decimal point go? (a) 0.657 (b) 65.7 (c) 0.0657 (d) 6.57
15. 15.0.19 × 1.3 — where does the decimal point go? (a) 0.247 (b) 2.47 (c) 0.00247 (d) 0.0247
16. 16.0.54 × 9 — where does the decimal point go? (a) 48.6 (b) 0.0486 (c) 4.86 (d) 0.486
17. 17.3.2 × 4.1 — where does the decimal point go? (a) 13.12 (b) 1.312 (c) 0.1312 (d) 131.2
18. 18.0.62 × 0.8 — where does the decimal point go? (a) 0.496 (b) 0.0496 (c) 4.96 (d) 0.00496
19. 19.7.9 × 0.6 — where does the decimal point go? (a) 0.0474 (b) 4.74 (c) 0.474 (d) 47.4
20. 20.0.21 × 12 — where does the decimal point go? (a) 25.2 (b) 0.252 (c) 2.52 (d) 0.0252
21. 21.9.6 × 9 — where does the decimal point go? (a) 864 (b) 0.864 (c) 86.4 (d) 8.64
22. 22.7.1 × 17 — where does the decimal point go? (a) 1.207 (b) 120.7 (c) 1207 (d) 12.07
23. 23.2.7 × 4 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 108 (d) 10.8
24. 24.0.89 × 2 — where does the decimal point go? (a) 0.178 (b) 1.78 (c) 17.8 (d) 0.0178
25. 25.4.2 × 4.8 — where does the decimal point go? (a) 20.16 (b) 201.6 (c) 0.2016 (d) 2.016
26. 26.0.26 × 0.2 — where does the decimal point go? (a) 0.0052 (b) 0.052 (c) 0.00052 (d) 0.52
27. 27.4.4 × 2.3 — where does the decimal point go? (a) 10.12 (b) 0.1012 (c) 1.012 (d) 101.2
28. 28.0.69 × 1.6 — where does the decimal point go? (a) 0.1104 (b) 11.04 (c) 0.01104 (d) 1.104
29. 29.3.7 × 0.8 — where does the decimal point go? (a) 0.296 (b) 0.0296 (c) 29.6 (d) 2.96
30. 30.0.81 × 0.7 — where does the decimal point go? (a) 5.67 (b) 0.0567 (c) 0.567 (d) 0.00567
31. 31.1.2 × 0.7 — where does the decimal point go? (a) 8.4 (b) 0.084 (c) 0.84 (d) 0.0084
32. 32.2.2 × 18 — where does the decimal point go? (a) 3.96 (b) 396 (c) 0.396 (d) 39.6
33. 33.6.9 × 25 — where does the decimal point go? (a) 17.25 (b) 1725 (c) 172.5 (d) 1.725
34. 34.0.58 × 2.1 — where does the decimal point go? (a) 0.01218 (b) 12.18 (c) 0.1218 (d) 1.218
35. 35.0.68 × 34 — where does the decimal point go? (a) 2.312 (b) 231.2 (c) 0.2312 (d) 23.12
36. 36.0.56 × 37 — where does the decimal point go? (a) 2.072 (b) 0.2072 (c) 20.72 (d) 207.2
37. 37.1.7 × 2 — where does the decimal point go? (a) 34 (b) 3.4 (c) 0.034 (d) 0.34
38. 38.8.3 × 8 — where does the decimal point go? (a) 6.64 (b) 664 (c) 66.4 (d) 0.664
39. 39.3.2 × 3.2 — where does the decimal point go? (a) 0.1024 (b) 102.4 (c) 10.24 (d) 1.024
40. 40.0.31 × 2.9 — where does the decimal point go? (a) 0.0899 (b) 0.899 (c) 0.00899 (d) 8.99

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