Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 260 · 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. 1.3.7 × 4 — where does the decimal point go? (a) 0.148 (b) 148 (c) 1.48 (d) 14.8
2. 2.5.5 × 1.1 — where does the decimal point go? (a) 0.605 (b) 6.05 (c) 0.0605 (d) 60.5
3. 3.9.9 × 41 — where does the decimal point go? (a) 405.9 (b) 40.59 (c) 4059 (d) 4.059
4. 4.0.21 × 0.6 — where does the decimal point go? (a) 0.00126 (b) 0.0126 (c) 0.126 (d) 1.26
5. 5.0.86 × 2 — where does the decimal point go? (a) 0.0172 (b) 1.72 (c) 17.2 (d) 0.172
6. 6.0.83 × 1.9 — where does the decimal point go? (a) 1.577 (b) 0.01577 (c) 0.1577 (d) 15.77
7. 7.7.2 × 41 — where does the decimal point go? (a) 29.52 (b) 2952 (c) 295.2 (d) 2.952
8. 8.0.91 × 33 — where does the decimal point go? (a) 3.003 (b) 300.3 (c) 30.03 (d) 0.3003
9. 9.0.77 × 7 — where does the decimal point go? (a) 5.39 (b) 0.539 (c) 0.0539 (d) 53.9
10. 10.2.1 × 2.7 — where does the decimal point go? (a) 56.7 (b) 0.0567 (c) 0.567 (d) 5.67
11. 11.0.83 × 48 — where does the decimal point go? (a) 39.84 (b) 3.984 (c) 398.4 (d) 0.3984
12. 12.0.25 × 39 — where does the decimal point go? (a) 9.75 (b) 0.0975 (c) 97.5 (d) 0.975
13. 13.6.4 × 0.2 — where does the decimal point go? (a) 0.0128 (b) 12.8 (c) 0.128 (d) 1.28
14. 14.0.18 × 1.2 — where does the decimal point go? (a) 0.00216 (b) 0.216 (c) 0.0216 (d) 2.16
15. 15.0.83 × 1.8 — where does the decimal point go? (a) 0.1494 (b) 1.494 (c) 14.94 (d) 0.01494
16. 16.1.7 × 7 — where does the decimal point go? (a) 119 (b) 1.19 (c) 0.119 (d) 11.9
17. 17.0.31 × 0.9 — where does the decimal point go? (a) 2.79 (b) 0.0279 (c) 0.00279 (d) 0.279
18. 18.0.78 × 9 — where does the decimal point go? (a) 0.702 (b) 7.02 (c) 70.2 (d) 0.0702
19. 19.0.71 × 1.7 — where does the decimal point go? (a) 0.01207 (b) 1.207 (c) 0.1207 (d) 12.07
20. 20.0.21 × 21 — where does the decimal point go? (a) 0.441 (b) 0.0441 (c) 44.1 (d) 4.41
21. 21.0.13 × 3 — where does the decimal point go? (a) 0.039 (b) 0.39 (c) 3.9 (d) 0.0039
22. 22.3.7 × 1.5 — where does the decimal point go? (a) 5.55 (b) 55.5 (c) 0.0555 (d) 0.555
23. 23.6.6 × 0.6 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 39.6 (d) 0.0396
24. 24.0.82 × 0.9 — where does the decimal point go? (a) 0.738 (b) 0.0738 (c) 0.00738 (d) 7.38
25. 25.0.51 × 39 — where does the decimal point go? (a) 19.89 (b) 198.9 (c) 1.989 (d) 0.1989
26. 26.5.7 × 0.9 — where does the decimal point go? (a) 0.0513 (b) 5.13 (c) 51.3 (d) 0.513
27. 27.0.47 × 17 — where does the decimal point go? (a) 0.799 (b) 0.0799 (c) 79.9 (d) 7.99
28. 28.8.3 × 9 — where does the decimal point go? (a) 74.7 (b) 7.47 (c) 747 (d) 0.747
29. 29.8.2 × 4.2 — where does the decimal point go? (a) 344.4 (b) 3.444 (c) 0.3444 (d) 34.44
30. 30.1.8 × 1.4 — where does the decimal point go? (a) 25.2 (b) 2.52 (c) 0.0252 (d) 0.252
31. 31.0.76 × 17 — where does the decimal point go? (a) 1.292 (b) 12.92 (c) 129.2 (d) 0.1292
32. 32.0.26 × 3.4 — where does the decimal point go? (a) 8.84 (b) 0.0884 (c) 0.00884 (d) 0.884
33. 33.0.97 × 0.2 — where does the decimal point go? (a) 0.00194 (b) 0.0194 (c) 1.94 (d) 0.194
34. 34.4.1 × 2.5 — where does the decimal point go? (a) 10.25 (b) 1.025 (c) 0.1025 (d) 102.5
35. 35.5.4 × 0.2 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
36. 36.5.3 × 45 — where does the decimal point go? (a) 2385 (b) 2.385 (c) 238.5 (d) 23.85
37. 37.2.1 × 32 — where does the decimal point go? (a) 67.2 (b) 0.672 (c) 6.72 (d) 672
38. 38.0.57 × 0.2 — where does the decimal point go? (a) 0.00114 (b) 0.0114 (c) 1.14 (d) 0.114
39. 39.0.44 × 1.2 — where does the decimal point go? (a) 0.0528 (b) 0.528 (c) 0.00528 (d) 5.28
40. 40.7.8 × 4.8 — where does the decimal point go? (a) 37.44 (b) 3.744 (c) 374.4 (d) 0.3744

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