Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 334 · 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. 1.0.82 × 2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 16.4 (d) 0.0164
2. 2.1.5 × 7 — where does the decimal point go? (a) 105 (b) 10.5 (c) 0.105 (d) 1.05
3. 3.0.62 × 0.7 — where does the decimal point go? (a) 0.434 (b) 0.00434 (c) 4.34 (d) 0.0434
4. 4.0.34 × 47 — where does the decimal point go? (a) 1.598 (b) 15.98 (c) 0.1598 (d) 159.8
5. 5.0.29 × 33 — where does the decimal point go? (a) 0.0957 (b) 0.957 (c) 95.7 (d) 9.57
6. 6.0.17 × 8 — where does the decimal point go? (a) 1.36 (b) 0.136 (c) 0.0136 (d) 13.6
7. 7.0.32 × 4 — where does the decimal point go? (a) 0.0128 (b) 0.128 (c) 12.8 (d) 1.28
8. 8.0.28 × 3 — where does the decimal point go? (a) 0.84 (b) 0.0084 (c) 8.4 (d) 0.084
9. 9.0.23 × 0.2 — where does the decimal point go? (a) 0.0046 (b) 0.46 (c) 0.046 (d) 0.00046
10. 10.0.78 × 38 — where does the decimal point go? (a) 0.2964 (b) 296.4 (c) 29.64 (d) 2.964
11. 11.1.7 × 3 — where does the decimal point go? (a) 0.51 (b) 5.1 (c) 0.051 (d) 51
12. 12.0.25 × 25 — where does the decimal point go? (a) 6.25 (b) 0.0625 (c) 62.5 (d) 0.625
13. 13.2.2 × 0.4 — where does the decimal point go? (a) 0.0088 (b) 0.088 (c) 8.8 (d) 0.88
14. 14.0.73 × 0.9 — where does the decimal point go? (a) 0.657 (b) 0.00657 (c) 0.0657 (d) 6.57
15. 15.0.34 × 2 — where does the decimal point go? (a) 0.068 (b) 0.68 (c) 0.0068 (d) 6.8
16. 16.0.36 × 4.6 — where does the decimal point go? (a) 0.1656 (b) 1.656 (c) 16.56 (d) 0.01656
17. 17.0.99 × 0.4 — where does the decimal point go? (a) 0.396 (b) 0.0396 (c) 0.00396 (d) 3.96
18. 18.0.77 × 1.7 — where does the decimal point go? (a) 0.01309 (b) 0.1309 (c) 13.09 (d) 1.309
19. 19.6.2 × 4 — where does the decimal point go? (a) 24.8 (b) 248 (c) 2.48 (d) 0.248
20. 20.6.7 × 0.3 — where does the decimal point go? (a) 0.201 (b) 0.0201 (c) 2.01 (d) 20.1
21. 21.0.19 × 6 — where does the decimal point go? (a) 11.4 (b) 0.114 (c) 1.14 (d) 0.0114
22. 22.0.54 × 2 — where does the decimal point go? (a) 10.8 (b) 0.0108 (c) 1.08 (d) 0.108
23. 23.3.1 × 0.6 — where does the decimal point go? (a) 1.86 (b) 18.6 (c) 0.186 (d) 0.0186
24. 24.1.9 × 3.3 — where does the decimal point go? (a) 62.7 (b) 0.0627 (c) 6.27 (d) 0.627
25. 25.1.7 × 32 — where does the decimal point go? (a) 5.44 (b) 54.4 (c) 0.544 (d) 544
26. 26.2.8 × 33 — where does the decimal point go? (a) 924 (b) 9.24 (c) 92.4 (d) 0.924
27. 27.2.7 × 24 — where does the decimal point go? (a) 64.8 (b) 6.48 (c) 648 (d) 0.648
28. 28.7.3 × 27 — where does the decimal point go? (a) 1971 (b) 197.1 (c) 19.71 (d) 1.971
29. 29.9.4 × 27 — where does the decimal point go? (a) 253.8 (b) 25.38 (c) 2.538 (d) 2538
30. 30.2.4 × 3 — where does the decimal point go? (a) 72 (b) 0.72 (c) 7.2 (d) 0.072
31. 31.5.6 × 0.8 — where does the decimal point go? (a) 4.48 (b) 0.448 (c) 44.8 (d) 0.0448
32. 32.0.56 × 3.6 — where does the decimal point go? (a) 0.2016 (b) 20.16 (c) 2.016 (d) 0.02016
33. 33.2.2 × 47 — where does the decimal point go? (a) 1.034 (b) 103.4 (c) 1034 (d) 10.34
34. 34.4.4 × 1.1 — where does the decimal point go? (a) 0.484 (b) 0.0484 (c) 48.4 (d) 4.84
35. 35.9.4 × 39 — where does the decimal point go? (a) 3666 (b) 366.6 (c) 36.66 (d) 3.666
36. 36.0.99 × 6 — where does the decimal point go? (a) 59.4 (b) 5.94 (c) 0.594 (d) 0.0594
37. 37.0.89 × 3.2 — where does the decimal point go? (a) 0.2848 (b) 0.02848 (c) 2.848 (d) 28.48
38. 38.5.5 × 49 — where does the decimal point go? (a) 2.695 (b) 26.95 (c) 2695 (d) 269.5
39. 39.0.22 × 1.8 — where does the decimal point go? (a) 0.00396 (b) 3.96 (c) 0.396 (d) 0.0396
40. 40.0.73 × 4.5 — where does the decimal point go? (a) 3.285 (b) 0.03285 (c) 0.3285 (d) 32.85

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