Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 238 · 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. 1.7.5 × 3.1 — where does the decimal point go? (a) 0.2325 (b) 232.5 (c) 2.325 (d) 23.25
2. 2.0.41 × 4.4 — where does the decimal point go? (a) 0.1804 (b) 18.04 (c) 0.01804 (d) 1.804
3. 3.3.8 × 4 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 152 (d) 15.2
4. 4.0.41 × 0.4 — where does the decimal point go? (a) 0.0164 (b) 1.64 (c) 0.00164 (d) 0.164
5. 5.0.17 × 0.2 — where does the decimal point go? (a) 0.00034 (b) 0.034 (c) 0.0034 (d) 0.34
6. 6.7.8 × 0.2 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 15.6 (d) 0.156
7. 7.9.9 × 9 — where does the decimal point go? (a) 8.91 (b) 89.1 (c) 891 (d) 0.891
8. 8.4.9 × 3.4 — where does the decimal point go? (a) 166.6 (b) 0.1666 (c) 16.66 (d) 1.666
9. 9.0.12 × 3 — where does the decimal point go? (a) 0.0036 (b) 0.036 (c) 3.6 (d) 0.36
10. 10.1.6 × 2.1 — where does the decimal point go? (a) 3.36 (b) 0.0336 (c) 33.6 (d) 0.336
11. 11.0.74 × 4.2 — where does the decimal point go? (a) 0.3108 (b) 3.108 (c) 31.08 (d) 0.03108
12. 12.0.37 × 0.4 — where does the decimal point go? (a) 1.48 (b) 0.00148 (c) 0.148 (d) 0.0148
13. 13.5.7 × 0.9 — where does the decimal point go? (a) 0.0513 (b) 5.13 (c) 51.3 (d) 0.513
14. 14.0.69 × 2.6 — where does the decimal point go? (a) 0.1794 (b) 17.94 (c) 1.794 (d) 0.01794
15. 15.5.3 × 3 — where does the decimal point go? (a) 1.59 (b) 15.9 (c) 159 (d) 0.159
16. 16.0.27 × 11 — where does the decimal point go? (a) 0.0297 (b) 29.7 (c) 0.297 (d) 2.97
17. 17.0.92 × 41 — where does the decimal point go? (a) 377.2 (b) 37.72 (c) 0.3772 (d) 3.772
18. 18.7.3 × 0.4 — where does the decimal point go? (a) 29.2 (b) 2.92 (c) 0.292 (d) 0.0292
19. 19.0.53 × 47 — where does the decimal point go? (a) 0.2491 (b) 249.1 (c) 2.491 (d) 24.91
20. 20.2.9 × 17 — where does the decimal point go? (a) 0.493 (b) 49.3 (c) 4.93 (d) 493
21. 21.0.39 × 1.6 — where does the decimal point go? (a) 0.00624 (b) 0.0624 (c) 6.24 (d) 0.624
22. 22.9.2 × 1.8 — where does the decimal point go? (a) 0.1656 (b) 16.56 (c) 1.656 (d) 165.6
23. 23.2.4 × 3.8 — where does the decimal point go? (a) 91.2 (b) 9.12 (c) 0.0912 (d) 0.912
24. 24.3.3 × 0.7 — where does the decimal point go? (a) 23.1 (b) 0.0231 (c) 2.31 (d) 0.231
25. 25.0.32 × 6 — where does the decimal point go? (a) 1.92 (b) 0.0192 (c) 0.192 (d) 19.2
26. 26.6.8 × 16 — where does the decimal point go? (a) 1088 (b) 108.8 (c) 10.88 (d) 1.088
27. 27.0.16 × 2 — where does the decimal point go? (a) 0.32 (b) 3.2 (c) 0.0032 (d) 0.032
28. 28.2.2 × 2.8 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 0.0616 (d) 61.6
29. 29.1.6 × 4.6 — where does the decimal point go? (a) 7.36 (b) 0.736 (c) 73.6 (d) 0.0736
30. 30.2.9 × 0.4 — where does the decimal point go? (a) 1.16 (b) 0.0116 (c) 11.6 (d) 0.116
31. 31.6.9 × 0.4 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 27.6 (d) 0.0276
32. 32.0.67 × 3.4 — where does the decimal point go? (a) 0.02278 (b) 2.278 (c) 0.2278 (d) 22.78
33. 33.0.51 × 8 — where does the decimal point go? (a) 4.08 (b) 0.0408 (c) 0.408 (d) 40.8
34. 34.3.8 × 2 — where does the decimal point go? (a) 0.076 (b) 7.6 (c) 0.76 (d) 76
35. 35.0.84 × 36 — where does the decimal point go? (a) 30.24 (b) 302.4 (c) 0.3024 (d) 3.024
36. 36.8.6 × 1.4 — where does the decimal point go? (a) 120.4 (b) 12.04 (c) 1.204 (d) 0.1204
37. 37.4.7 × 3.9 — where does the decimal point go? (a) 0.1833 (b) 18.33 (c) 183.3 (d) 1.833
38. 38.0.98 × 0.6 — where does the decimal point go? (a) 0.0588 (b) 0.588 (c) 0.00588 (d) 5.88
39. 39.3.2 × 26 — where does the decimal point go? (a) 83.2 (b) 8.32 (c) 0.832 (d) 832
40. 40.0.84 × 32 — where does the decimal point go? (a) 2.688 (b) 0.2688 (c) 26.88 (d) 268.8

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