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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 578 · 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. 1.0.82 × 0.2 — where does the decimal point go? (a) 0.0164 (b) 1.64 (c) 0.00164 (d) 0.164
  2. 2.0.96 × 0.9 — where does the decimal point go? (a) 8.64 (b) 0.0864 (c) 0.00864 (d) 0.864
  3. 3.6.2 × 3 — where does the decimal point go? (a) 0.186 (b) 186 (c) 18.6 (d) 1.86
  4. 4.1.9 × 0.3 — where does the decimal point go? (a) 0.0057 (b) 0.57 (c) 5.7 (d) 0.057
  5. 5.0.97 × 39 — where does the decimal point go? (a) 0.3783 (b) 37.83 (c) 378.3 (d) 3.783
  6. 6.2.3 × 13 — where does the decimal point go? (a) 29.9 (b) 0.299 (c) 299 (d) 2.99
  7. 7.2.4 × 0.2 — where does the decimal point go? (a) 0.0048 (b) 4.8 (c) 0.048 (d) 0.48
  8. 8.0.39 × 22 — where does the decimal point go? (a) 85.8 (b) 8.58 (c) 0.0858 (d) 0.858
  9. 9.0.65 × 25 — where does the decimal point go? (a) 1.625 (b) 16.25 (c) 162.5 (d) 0.1625
  10. 10.0.88 × 43 — where does the decimal point go? (a) 37.84 (b) 378.4 (c) 0.3784 (d) 3.784
  11. 11.1.7 × 1.2 — where does the decimal point go? (a) 2.04 (b) 0.0204 (c) 20.4 (d) 0.204
  12. 12.5.1 × 9 — where does the decimal point go? (a) 459 (b) 0.459 (c) 45.9 (d) 4.59
  13. 13.3.6 × 0.7 — where does the decimal point go? (a) 0.252 (b) 25.2 (c) 2.52 (d) 0.0252
  14. 14.0.78 × 3 — where does the decimal point go? (a) 2.34 (b) 0.0234 (c) 23.4 (d) 0.234
  15. 15.0.75 × 29 — where does the decimal point go? (a) 2.175 (b) 21.75 (c) 217.5 (d) 0.2175
  16. 16.5.3 × 46 — where does the decimal point go? (a) 2.438 (b) 24.38 (c) 243.8 (d) 2438
  17. 17.5.9 × 0.7 — where does the decimal point go? (a) 0.0413 (b) 41.3 (c) 4.13 (d) 0.413
  18. 18.0.76 × 47 — where does the decimal point go? (a) 35.72 (b) 0.3572 (c) 357.2 (d) 3.572
  19. 19.2.1 × 0.4 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 8.4 (d) 0.0084
  20. 20.1.9 × 2 — where does the decimal point go? (a) 38 (b) 0.038 (c) 3.8 (d) 0.38
  21. 21.8.1 × 0.3 — where does the decimal point go? (a) 0.0243 (b) 0.243 (c) 2.43 (d) 24.3
  22. 22.0.38 × 6 — where does the decimal point go? (a) 2.28 (b) 0.0228 (c) 22.8 (d) 0.228
  23. 23.2.4 × 2.8 — where does the decimal point go? (a) 6.72 (b) 0.0672 (c) 0.672 (d) 67.2
  24. 24.0.99 × 3.6 — where does the decimal point go? (a) 0.3564 (b) 35.64 (c) 3.564 (d) 0.03564
  25. 25.0.91 × 3 — where does the decimal point go? (a) 27.3 (b) 2.73 (c) 0.0273 (d) 0.273
  26. 26.0.84 × 3.3 — where does the decimal point go? (a) 0.2772 (b) 0.02772 (c) 2.772 (d) 27.72
  27. 27.1.9 × 4 — where does the decimal point go? (a) 0.076 (b) 7.6 (c) 0.76 (d) 76
  28. 28.0.41 × 0.6 — where does the decimal point go? (a) 0.0246 (b) 0.246 (c) 0.00246 (d) 2.46
  29. 29.1.9 × 19 — where does the decimal point go? (a) 36.1 (b) 361 (c) 3.61 (d) 0.361
  30. 30.1.7 × 9 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 15.3 (d) 153
  31. 31.5.6 × 0.3 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.0168 (d) 0.168
  32. 32.0.63 × 49 — where does the decimal point go? (a) 0.3087 (b) 30.87 (c) 308.7 (d) 3.087
  33. 33.0.42 × 4.2 — where does the decimal point go? (a) 0.1764 (b) 1.764 (c) 0.01764 (d) 17.64
  34. 34.4.7 × 16 — where does the decimal point go? (a) 7.52 (b) 75.2 (c) 0.752 (d) 752
  35. 35.4.7 × 1.9 — where does the decimal point go? (a) 89.3 (b) 0.0893 (c) 0.893 (d) 8.93
  36. 36.0.16 × 21 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 33.6 (d) 0.0336
  37. 37.6.1 × 6 — where does the decimal point go? (a) 366 (b) 36.6 (c) 3.66 (d) 0.366
  38. 38.0.32 × 2 — where does the decimal point go? (a) 6.4 (b) 0.0064 (c) 0.064 (d) 0.64
  39. 39.0.97 × 0.7 — where does the decimal point go? (a) 0.679 (b) 6.79 (c) 0.0679 (d) 0.00679
  40. 40.6.1 × 49 — where does the decimal point go? (a) 2989 (b) 298.9 (c) 2.989 (d) 29.89

Answer key

  1. 0.164
  2. 0.864
  3. 18.6
  4. 0.57
  5. 37.83
  6. 29.9
  7. 0.48
  8. 8.58
  9. 16.25
  10. 37.84
  11. 2.04
  12. 45.9
  13. 2.52
  14. 2.34
  15. 21.75
  16. 243.8
  17. 4.13
  18. 35.72
  19. 0.84
  20. 3.8
  21. 2.43
  22. 2.28
  23. 6.72
  24. 3.564
  25. 2.73
  26. 2.772
  27. 7.6
  28. 0.246
  29. 36.1
  30. 15.3
  31. 1.68
  32. 30.87
  33. 1.764
  34. 75.2
  35. 8.93
  36. 3.36
  37. 36.6
  38. 0.64
  39. 0.679
  40. 298.9

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