Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 189 · 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. 1.0.91 × 7 — where does the decimal point go? (a) 63.7 (b) 0.0637 (c) 6.37 (d) 0.637
2. 2.0.29 × 3 — where does the decimal point go? (a) 0.0087 (b) 8.7 (c) 0.087 (d) 0.87
3. 3.0.21 × 6 — where does the decimal point go? (a) 0.0126 (b) 0.126 (c) 12.6 (d) 1.26
4. 4.3.3 × 2 — where does the decimal point go? (a) 0.66 (b) 0.066 (c) 6.6 (d) 66
5. 5.0.56 × 7 — where does the decimal point go? (a) 39.2 (b) 0.0392 (c) 0.392 (d) 3.92
6. 6.5.4 × 7 — where does the decimal point go? (a) 378 (b) 0.378 (c) 3.78 (d) 37.8
7. 7.0.21 × 34 — where does the decimal point go? (a) 7.14 (b) 0.714 (c) 0.0714 (d) 71.4
8. 8.1.2 × 0.8 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 9.6 (d) 0.096
9. 9.0.66 × 14 — where does the decimal point go? (a) 0.924 (b) 0.0924 (c) 9.24 (d) 92.4
10. 10.0.17 × 1.5 — where does the decimal point go? (a) 0.00255 (b) 2.55 (c) 0.0255 (d) 0.255
11. 11.4.7 × 4 — where does the decimal point go? (a) 1.88 (b) 18.8 (c) 0.188 (d) 188
12. 12.0.82 × 2.3 — where does the decimal point go? (a) 0.1886 (b) 1.886 (c) 18.86 (d) 0.01886
13. 13.0.45 × 0.7 — where does the decimal point go? (a) 0.0315 (b) 3.15 (c) 0.315 (d) 0.00315
14. 14.9.8 × 0.2 — where does the decimal point go? (a) 19.6 (b) 0.0196 (c) 0.196 (d) 1.96
15. 15.0.51 × 0.8 — where does the decimal point go? (a) 0.0408 (b) 0.00408 (c) 0.408 (d) 4.08
16. 16.0.31 × 2 — where does the decimal point go? (a) 0.62 (b) 0.062 (c) 0.0062 (d) 6.2
17. 17.0.67 × 3.4 — where does the decimal point go? (a) 2.278 (b) 22.78 (c) 0.2278 (d) 0.02278
18. 18.4.2 × 41 — where does the decimal point go? (a) 1722 (b) 1.722 (c) 17.22 (d) 172.2
19. 19.0.16 × 0.8 — where does the decimal point go? (a) 1.28 (b) 0.0128 (c) 0.00128 (d) 0.128
20. 20.0.97 × 3.6 — where does the decimal point go? (a) 34.92 (b) 0.03492 (c) 3.492 (d) 0.3492
21. 21.8.4 × 46 — where does the decimal point go? (a) 38.64 (b) 3864 (c) 3.864 (d) 386.4
22. 22.3.2 × 0.4 — where does the decimal point go? (a) 1.28 (b) 0.0128 (c) 12.8 (d) 0.128
23. 23.0.82 × 0.8 — where does the decimal point go? (a) 6.56 (b) 0.00656 (c) 0.656 (d) 0.0656
24. 24.6.2 × 4 — where does the decimal point go? (a) 2.48 (b) 24.8 (c) 248 (d) 0.248
25. 25.0.57 × 6 — where does the decimal point go? (a) 34.2 (b) 0.0342 (c) 0.342 (d) 3.42
26. 26.7.6 × 0.9 — where does the decimal point go? (a) 6.84 (b) 68.4 (c) 0.0684 (d) 0.684
27. 27.0.22 × 0.8 — where does the decimal point go? (a) 1.76 (b) 0.0176 (c) 0.00176 (d) 0.176
28. 28.4.9 × 8 — where does the decimal point go? (a) 39.2 (b) 0.392 (c) 3.92 (d) 392
29. 29.0.28 × 0.3 — where does the decimal point go? (a) 0.84 (b) 0.00084 (c) 0.0084 (d) 0.084
30. 30.2.9 × 2.2 — where does the decimal point go? (a) 6.38 (b) 63.8 (c) 0.0638 (d) 0.638
31. 31.0.97 × 0.9 — where does the decimal point go? (a) 0.00873 (b) 8.73 (c) 0.873 (d) 0.0873
32. 32.4.4 × 2.8 — where does the decimal point go? (a) 1.232 (b) 123.2 (c) 0.1232 (d) 12.32
33. 33.6.1 × 3 — where does the decimal point go? (a) 0.183 (b) 1.83 (c) 18.3 (d) 183
34. 34.5.7 × 12 — where does the decimal point go? (a) 6.84 (b) 68.4 (c) 0.684 (d) 684
35. 35.0.37 × 0.2 — where does the decimal point go? (a) 0.74 (b) 0.00074 (c) 0.0074 (d) 0.074
36. 36.8.6 × 34 — where does the decimal point go? (a) 2924 (b) 292.4 (c) 29.24 (d) 2.924
37. 37.6.9 × 2 — where does the decimal point go? (a) 1.38 (b) 13.8 (c) 138 (d) 0.138
38. 38.4.2 × 4 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
39. 39.7.7 × 41 — where does the decimal point go? (a) 31.57 (b) 3157 (c) 315.7 (d) 3.157
40. 40.0.46 × 7 — where does the decimal point go? (a) 3.22 (b) 0.322 (c) 0.0322 (d) 32.2

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