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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 678 · 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. 1.0.37 × 1.3 — where does the decimal point go? (a) 4.81 (b) 0.00481 (c) 0.481 (d) 0.0481
  2. 2.4.2 × 2.3 — where does the decimal point go? (a) 9.66 (b) 0.0966 (c) 96.6 (d) 0.966
  3. 3.9.9 × 7 — where does the decimal point go? (a) 6.93 (b) 693 (c) 69.3 (d) 0.693
  4. 4.0.28 × 7 — where does the decimal point go? (a) 19.6 (b) 0.0196 (c) 0.196 (d) 1.96
  5. 5.2.4 × 7 — where does the decimal point go? (a) 1.68 (b) 168 (c) 0.168 (d) 16.8
  6. 6.1.7 × 3 — where does the decimal point go? (a) 0.51 (b) 5.1 (c) 0.051 (d) 51
  7. 7.0.14 × 0.6 — where does the decimal point go? (a) 0.00084 (b) 0.084 (c) 0.0084 (d) 0.84
  8. 8.3.8 × 0.7 — where does the decimal point go? (a) 26.6 (b) 2.66 (c) 0.0266 (d) 0.266
  9. 9.8.8 × 1.8 — where does the decimal point go? (a) 0.1584 (b) 15.84 (c) 158.4 (d) 1.584
  10. 10.3.7 × 4.8 — where does the decimal point go? (a) 0.1776 (b) 1.776 (c) 17.76 (d) 177.6
  11. 11.1.4 × 0.4 — where does the decimal point go? (a) 0.056 (b) 0.0056 (c) 5.6 (d) 0.56
  12. 12.4.4 × 1.7 — where does the decimal point go? (a) 0.748 (b) 7.48 (c) 0.0748 (d) 74.8
  13. 13.8.1 × 0.2 — where does the decimal point go? (a) 16.2 (b) 1.62 (c) 0.162 (d) 0.0162
  14. 14.4.6 × 0.3 — where does the decimal point go? (a) 0.0138 (b) 1.38 (c) 13.8 (d) 0.138
  15. 15.4.4 × 2.3 — where does the decimal point go? (a) 101.2 (b) 10.12 (c) 1.012 (d) 0.1012
  16. 16.1.6 × 0.4 — where does the decimal point go? (a) 0.064 (b) 6.4 (c) 0.0064 (d) 0.64
  17. 17.0.12 × 6 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 0.072 (d) 0.0072
  18. 18.9.4 × 4.2 — where does the decimal point go? (a) 3.948 (b) 394.8 (c) 39.48 (d) 0.3948
  19. 19.2.7 × 7 — where does the decimal point go? (a) 18.9 (b) 189 (c) 0.189 (d) 1.89
  20. 20.4.7 × 23 — where does the decimal point go? (a) 10.81 (b) 108.1 (c) 1.081 (d) 1081
  21. 21.0.42 × 0.8 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 0.00336 (d) 3.36
  22. 22.8.6 × 8 — where does the decimal point go? (a) 68.8 (b) 6.88 (c) 0.688 (d) 688
  23. 23.2.4 × 0.4 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.0096 (d) 0.96
  24. 24.1.5 × 3 — where does the decimal point go? (a) 0.45 (b) 4.5 (c) 0.045 (d) 45
  25. 25.0.28 × 33 — where does the decimal point go? (a) 0.0924 (b) 9.24 (c) 92.4 (d) 0.924
  26. 26.2.3 × 2 — where does the decimal point go? (a) 46 (b) 4.6 (c) 0.046 (d) 0.46
  27. 27.4.7 × 5 — where does the decimal point go? (a) 2.35 (b) 0.235 (c) 235 (d) 23.5
  28. 28.8.4 × 44 — where does the decimal point go? (a) 3.696 (b) 3696 (c) 369.6 (d) 36.96
  29. 29.0.52 × 0.4 — where does the decimal point go? (a) 2.08 (b) 0.208 (c) 0.0208 (d) 0.00208
  30. 30.0.98 × 3 — where does the decimal point go? (a) 0.294 (b) 2.94 (c) 29.4 (d) 0.0294
  31. 31.0.75 × 3 — where does the decimal point go? (a) 0.225 (b) 22.5 (c) 2.25 (d) 0.0225
  32. 32.0.43 × 9 — where does the decimal point go? (a) 0.0387 (b) 38.7 (c) 0.387 (d) 3.87
  33. 33.7.1 × 41 — where does the decimal point go? (a) 291.1 (b) 2911 (c) 2.911 (d) 29.11
  34. 34.2.4 × 0.3 — where does the decimal point go? (a) 0.72 (b) 0.0072 (c) 7.2 (d) 0.072
  35. 35.0.71 × 0.4 — where does the decimal point go? (a) 0.284 (b) 0.00284 (c) 0.0284 (d) 2.84
  36. 36.5.5 × 9 — where does the decimal point go? (a) 0.495 (b) 49.5 (c) 495 (d) 4.95
  37. 37.0.57 × 5 — where does the decimal point go? (a) 2.85 (b) 0.285 (c) 28.5 (d) 0.0285
  38. 38.3.7 × 44 — where does the decimal point go? (a) 16.28 (b) 162.8 (c) 1628 (d) 1.628
  39. 39.3.8 × 1.7 — where does the decimal point go? (a) 6.46 (b) 0.0646 (c) 64.6 (d) 0.646
  40. 40.0.75 × 4.7 — where does the decimal point go? (a) 0.03525 (b) 0.3525 (c) 35.25 (d) 3.525

Answer key

  1. 0.481
  2. 9.66
  3. 69.3
  4. 1.96
  5. 16.8
  6. 5.1
  7. 0.084
  8. 2.66
  9. 15.84
  10. 17.76
  11. 0.56
  12. 7.48
  13. 1.62
  14. 1.38
  15. 10.12
  16. 0.64
  17. 0.72
  18. 39.48
  19. 18.9
  20. 108.1
  21. 0.336
  22. 68.8
  23. 0.96
  24. 4.5
  25. 9.24
  26. 4.6
  27. 23.5
  28. 369.6
  29. 0.208
  30. 2.94
  31. 2.25
  32. 3.87
  33. 291.1
  34. 0.72
  35. 0.284
  36. 49.5
  37. 2.85
  38. 162.8
  39. 6.46
  40. 3.525

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