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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 438 · 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. 1.0.47 × 0.7 — where does the decimal point go? (a) 0.00329 (b) 3.29 (c) 0.329 (d) 0.0329
  2. 2.5.6 × 17 — where does the decimal point go? (a) 95.2 (b) 0.952 (c) 952 (d) 9.52
  3. 3.8.6 × 2.7 — where does the decimal point go? (a) 23.22 (b) 232.2 (c) 0.2322 (d) 2.322
  4. 4.0.79 × 5 — where does the decimal point go? (a) 39.5 (b) 0.0395 (c) 0.395 (d) 3.95
  5. 5.0.81 × 0.2 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 0.00162 (d) 1.62
  6. 6.3.7 × 32 — where does the decimal point go? (a) 1.184 (b) 118.4 (c) 1184 (d) 11.84
  7. 7.9.9 × 28 — where does the decimal point go? (a) 2772 (b) 2.772 (c) 277.2 (d) 27.72
  8. 8.9.3 × 0.3 — where does the decimal point go? (a) 2.79 (b) 0.279 (c) 27.9 (d) 0.0279
  9. 9.0.14 × 4 — where does the decimal point go? (a) 0.0056 (b) 0.056 (c) 5.6 (d) 0.56
  10. 10.0.12 × 4 — where does the decimal point go? (a) 0.048 (b) 0.0048 (c) 4.8 (d) 0.48
  11. 11.4.1 × 28 — where does the decimal point go? (a) 1148 (b) 114.8 (c) 11.48 (d) 1.148
  12. 12.8.4 × 4 — where does the decimal point go? (a) 0.336 (b) 33.6 (c) 336 (d) 3.36
  13. 13.5.9 × 4 — where does the decimal point go? (a) 2.36 (b) 23.6 (c) 0.236 (d) 236
  14. 14.0.85 × 0.7 — where does the decimal point go? (a) 0.0595 (b) 0.00595 (c) 0.595 (d) 5.95
  15. 15.0.63 × 15 — where does the decimal point go? (a) 0.0945 (b) 0.945 (c) 9.45 (d) 94.5
  16. 16.1.3 × 33 — where does the decimal point go? (a) 4.29 (b) 429 (c) 42.9 (d) 0.429
  17. 17.4.4 × 2 — where does the decimal point go? (a) 88 (b) 0.88 (c) 0.088 (d) 8.8
  18. 18.1.8 × 2 — where does the decimal point go? (a) 36 (b) 0.36 (c) 0.036 (d) 3.6
  19. 19.0.33 × 0.7 — where does the decimal point go? (a) 0.231 (b) 0.0231 (c) 0.00231 (d) 2.31
  20. 20.7.8 × 3.9 — where does the decimal point go? (a) 0.3042 (b) 30.42 (c) 304.2 (d) 3.042
  21. 21.0.44 × 0.2 — where does the decimal point go? (a) 0.00088 (b) 0.0088 (c) 0.88 (d) 0.088
  22. 22.0.28 × 14 — where does the decimal point go? (a) 39.2 (b) 0.0392 (c) 3.92 (d) 0.392
  23. 23.6.3 × 0.6 — where does the decimal point go? (a) 0.0378 (b) 0.378 (c) 37.8 (d) 3.78
  24. 24.7.7 × 1.8 — where does the decimal point go? (a) 1.386 (b) 13.86 (c) 138.6 (d) 0.1386
  25. 25.2.9 × 12 — where does the decimal point go? (a) 3.48 (b) 0.348 (c) 348 (d) 34.8
  26. 26.3.5 × 7 — where does the decimal point go? (a) 0.245 (b) 245 (c) 2.45 (d) 24.5
  27. 27.1.3 × 11 — where does the decimal point go? (a) 0.143 (b) 1.43 (c) 143 (d) 14.3
  28. 28.0.19 × 16 — where does the decimal point go? (a) 0.0304 (b) 30.4 (c) 3.04 (d) 0.304
  29. 29.0.28 × 2 — where does the decimal point go? (a) 5.6 (b) 0.56 (c) 0.0056 (d) 0.056
  30. 30.1.9 × 5 — where does the decimal point go? (a) 0.095 (b) 95 (c) 9.5 (d) 0.95
  31. 31.0.26 × 37 — where does the decimal point go? (a) 9.62 (b) 0.962 (c) 96.2 (d) 0.0962
  32. 32.0.45 × 4.5 — where does the decimal point go? (a) 0.2025 (b) 0.02025 (c) 2.025 (d) 20.25
  33. 33.5.3 × 2.5 — where does the decimal point go? (a) 13.25 (b) 1.325 (c) 0.1325 (d) 132.5
  34. 34.0.39 × 3 — where does the decimal point go? (a) 0.0117 (b) 1.17 (c) 11.7 (d) 0.117
  35. 35.0.53 × 0.3 — where does the decimal point go? (a) 0.0159 (b) 0.00159 (c) 1.59 (d) 0.159
  36. 36.7.2 × 2 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 144 (d) 1.44
  37. 37.6.4 × 0.4 — where does the decimal point go? (a) 0.0256 (b) 0.256 (c) 25.6 (d) 2.56
  38. 38.0.97 × 0.9 — where does the decimal point go? (a) 0.0873 (b) 0.873 (c) 0.00873 (d) 8.73
  39. 39.9.6 × 6 — where does the decimal point go? (a) 0.576 (b) 5.76 (c) 576 (d) 57.6
  40. 40.0.99 × 35 — where does the decimal point go? (a) 346.5 (b) 3.465 (c) 34.65 (d) 0.3465

Answer key

  1. 0.329
  2. 95.2
  3. 23.22
  4. 3.95
  5. 0.162
  6. 118.4
  7. 277.2
  8. 2.79
  9. 0.56
  10. 0.48
  11. 114.8
  12. 33.6
  13. 23.6
  14. 0.595
  15. 9.45
  16. 42.9
  17. 8.8
  18. 3.6
  19. 0.231
  20. 30.42
  21. 0.088
  22. 3.92
  23. 3.78
  24. 13.86
  25. 34.8
  26. 24.5
  27. 14.3
  28. 3.04
  29. 0.56
  30. 9.5
  31. 9.62
  32. 2.025
  33. 13.25
  34. 1.17
  35. 0.159
  36. 14.4
  37. 2.56
  38. 0.873
  39. 57.6
  40. 34.65

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