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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 119 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.4.9 × 0.5 — where does the decimal point go? (a) 0.245 (b) 2.45 (c) 24.5 (d) 0.0245
  2. 2.0.79 × 9 — where does the decimal point go? (a) 7.11 (b) 0.0711 (c) 71.1 (d) 0.711
  3. 3.0.88 × 4.6 — where does the decimal point go? (a) 40.48 (b) 0.4048 (c) 0.04048 (d) 4.048
  4. 4.0.24 × 11 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 26.4 (d) 0.264
  5. 5.8.8 × 1.4 — where does the decimal point go? (a) 0.1232 (b) 1.232 (c) 12.32 (d) 123.2
  6. 6.0.37 × 0.7 — where does the decimal point go? (a) 2.59 (b) 0.0259 (c) 0.259 (d) 0.00259
  7. 7.6.8 × 3 — where does the decimal point go? (a) 0.204 (b) 2.04 (c) 204 (d) 20.4
  8. 8.8.9 × 0.4 — where does the decimal point go? (a) 0.356 (b) 3.56 (c) 35.6 (d) 0.0356
  9. 9.7.3 × 0.2 — where does the decimal point go? (a) 0.0146 (b) 14.6 (c) 0.146 (d) 1.46
  10. 10.0.32 × 1.7 — where does the decimal point go? (a) 5.44 (b) 0.0544 (c) 0.544 (d) 0.00544
  11. 11.9.7 × 9 — where does the decimal point go? (a) 0.873 (b) 8.73 (c) 87.3 (d) 873
  12. 12.4.3 × 24 — where does the decimal point go? (a) 10.32 (b) 1032 (c) 1.032 (d) 103.2
  13. 13.0.25 × 3 — where does the decimal point go? (a) 0.075 (b) 0.75 (c) 7.5 (d) 0.0075
  14. 14.0.77 × 22 — where does the decimal point go? (a) 0.1694 (b) 16.94 (c) 169.4 (d) 1.694
  15. 15.0.77 × 0.4 — where does the decimal point go? (a) 3.08 (b) 0.00308 (c) 0.0308 (d) 0.308
  16. 16.8.8 × 1.9 — where does the decimal point go? (a) 0.1672 (b) 16.72 (c) 167.2 (d) 1.672
  17. 17.2.9 × 4 — where does the decimal point go? (a) 116 (b) 11.6 (c) 0.116 (d) 1.16
  18. 18.1.7 × 0.5 — where does the decimal point go? (a) 8.5 (b) 0.085 (c) 0.85 (d) 0.0085
  19. 19.0.64 × 0.3 — where does the decimal point go? (a) 0.0192 (b) 1.92 (c) 0.00192 (d) 0.192
  20. 20.8.4 × 0.9 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 0.0756 (d) 75.6
  21. 21.0.73 × 4.3 — where does the decimal point go? (a) 31.39 (b) 0.03139 (c) 3.139 (d) 0.3139
  22. 22.4.1 × 17 — where does the decimal point go? (a) 69.7 (b) 6.97 (c) 697 (d) 0.697
  23. 23.0.24 × 1.4 — where does the decimal point go? (a) 0.00336 (b) 0.0336 (c) 3.36 (d) 0.336
  24. 24.4.3 × 47 — where does the decimal point go? (a) 2.021 (b) 2021 (c) 202.1 (d) 20.21
  25. 25.0.91 × 29 — where does the decimal point go? (a) 0.2639 (b) 263.9 (c) 26.39 (d) 2.639
  26. 26.0.18 × 0.2 — where does the decimal point go? (a) 0.00036 (b) 0.0036 (c) 0.36 (d) 0.036
  27. 27.4.4 × 0.3 — where does the decimal point go? (a) 0.0132 (b) 0.132 (c) 1.32 (d) 13.2
  28. 28.0.13 × 22 — where does the decimal point go? (a) 0.0286 (b) 2.86 (c) 0.286 (d) 28.6
  29. 29.0.53 × 0.7 — where does the decimal point go? (a) 0.371 (b) 3.71 (c) 0.00371 (d) 0.0371
  30. 30.0.24 × 18 — where does the decimal point go? (a) 43.2 (b) 0.0432 (c) 4.32 (d) 0.432
  31. 31.2.1 × 0.3 — where does the decimal point go? (a) 0.0063 (b) 6.3 (c) 0.063 (d) 0.63
  32. 32.0.79 × 4.8 — where does the decimal point go? (a) 3.792 (b) 0.03792 (c) 0.3792 (d) 37.92
  33. 33.0.56 × 12 — where does the decimal point go? (a) 6.72 (b) 0.0672 (c) 67.2 (d) 0.672
  34. 34.4.5 × 7 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 0.315 (d) 315
  35. 35.0.69 × 2 — where does the decimal point go? (a) 13.8 (b) 1.38 (c) 0.138 (d) 0.0138
  36. 36.0.98 × 49 — where does the decimal point go? (a) 480.2 (b) 48.02 (c) 0.4802 (d) 4.802
  37. 37.4.9 × 47 — where does the decimal point go? (a) 2303 (b) 2.303 (c) 230.3 (d) 23.03
  38. 38.2.8 × 36 — where does the decimal point go? (a) 10.08 (b) 100.8 (c) 1.008 (d) 1008
  39. 39.0.59 × 46 — where does the decimal point go? (a) 0.2714 (b) 2.714 (c) 27.14 (d) 271.4
  40. 40.0.61 × 8 — where does the decimal point go? (a) 0.488 (b) 48.8 (c) 0.0488 (d) 4.88

Answer key

  1. 2.45
  2. 7.11
  3. 4.048
  4. 2.64
  5. 12.32
  6. 0.259
  7. 20.4
  8. 3.56
  9. 1.46
  10. 0.544
  11. 87.3
  12. 103.2
  13. 0.75
  14. 16.94
  15. 0.308
  16. 16.72
  17. 11.6
  18. 0.85
  19. 0.192
  20. 7.56
  21. 3.139
  22. 69.7
  23. 0.336
  24. 202.1
  25. 26.39
  26. 0.036
  27. 1.32
  28. 2.86
  29. 0.371
  30. 4.32
  31. 0.63
  32. 3.792
  33. 6.72
  34. 31.5
  35. 1.38
  36. 48.02
  37. 230.3
  38. 100.8
  39. 27.14
  40. 4.88

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