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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 294 · 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. 1.0.72 × 3.6 — where does the decimal point go? (a) 0.02592 (b) 25.92 (c) 2.592 (d) 0.2592
  2. 2.4.6 × 4 — where does the decimal point go? (a) 1.84 (b) 0.184 (c) 18.4 (d) 184
  3. 3.4.2 × 9 — where does the decimal point go? (a) 0.378 (b) 37.8 (c) 3.78 (d) 378
  4. 4.7.2 × 3.8 — where does the decimal point go? (a) 273.6 (b) 27.36 (c) 0.2736 (d) 2.736
  5. 5.5.7 × 8 — where does the decimal point go? (a) 456 (b) 4.56 (c) 45.6 (d) 0.456
  6. 6.0.96 × 0.6 — where does the decimal point go? (a) 0.0576 (b) 0.00576 (c) 0.576 (d) 5.76
  7. 7.9.4 × 0.4 — where does the decimal point go? (a) 37.6 (b) 0.376 (c) 3.76 (d) 0.0376
  8. 8.0.18 × 2 — where does the decimal point go? (a) 3.6 (b) 0.036 (c) 0.36 (d) 0.0036
  9. 9.9.9 × 0.7 — where does the decimal point go? (a) 6.93 (b) 0.693 (c) 69.3 (d) 0.0693
  10. 10.4.3 × 43 — where does the decimal point go? (a) 18.49 (b) 1849 (c) 184.9 (d) 1.849
  11. 11.0.64 × 0.4 — where does the decimal point go? (a) 0.256 (b) 0.0256 (c) 0.00256 (d) 2.56
  12. 12.5.9 × 0.2 — where does the decimal point go? (a) 0.118 (b) 11.8 (c) 1.18 (d) 0.0118
  13. 13.1.6 × 0.2 — where does the decimal point go? (a) 0.032 (b) 3.2 (c) 0.32 (d) 0.0032
  14. 14.0.95 × 0.5 — where does the decimal point go? (a) 4.75 (b) 0.475 (c) 0.0475 (d) 0.00475
  15. 15.7.1 × 25 — where does the decimal point go? (a) 1775 (b) 17.75 (c) 1.775 (d) 177.5
  16. 16.2.3 × 3 — where does the decimal point go? (a) 0.069 (b) 0.69 (c) 69 (d) 6.9
  17. 17.9.6 × 6 — where does the decimal point go? (a) 0.576 (b) 576 (c) 5.76 (d) 57.6
  18. 18.1.7 × 5 — where does the decimal point go? (a) 8.5 (b) 0.085 (c) 0.85 (d) 85
  19. 19.2.1 × 3 — where does the decimal point go? (a) 63 (b) 6.3 (c) 0.63 (d) 0.063
  20. 20.0.88 × 9 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 0.0792 (d) 0.792
  21. 21.0.34 × 9 — where does the decimal point go? (a) 3.06 (b) 0.0306 (c) 30.6 (d) 0.306
  22. 22.0.27 × 35 — where does the decimal point go? (a) 9.45 (b) 94.5 (c) 0.945 (d) 0.0945
  23. 23.1.8 × 3.6 — where does the decimal point go? (a) 6.48 (b) 64.8 (c) 0.648 (d) 0.0648
  24. 24.0.29 × 0.3 — where does the decimal point go? (a) 0.087 (b) 0.87 (c) 0.00087 (d) 0.0087
  25. 25.0.29 × 21 — where does the decimal point go? (a) 60.9 (b) 0.609 (c) 6.09 (d) 0.0609
  26. 26.0.54 × 4.9 — where does the decimal point go? (a) 2.646 (b) 0.2646 (c) 0.02646 (d) 26.46
  27. 27.1.7 × 3.4 — where does the decimal point go? (a) 57.8 (b) 5.78 (c) 0.578 (d) 0.0578
  28. 28.0.51 × 7 — where does the decimal point go? (a) 0.0357 (b) 0.357 (c) 3.57 (d) 35.7
  29. 29.0.99 × 4.6 — where does the decimal point go? (a) 0.4554 (b) 0.04554 (c) 45.54 (d) 4.554
  30. 30.8.3 × 3 — where does the decimal point go? (a) 2.49 (b) 249 (c) 0.249 (d) 24.9
  31. 31.0.96 × 3.3 — where does the decimal point go? (a) 31.68 (b) 0.3168 (c) 0.03168 (d) 3.168
  32. 32.0.74 × 3.7 — where does the decimal point go? (a) 2.738 (b) 0.2738 (c) 0.02738 (d) 27.38
  33. 33.6.5 × 7 — where does the decimal point go? (a) 4.55 (b) 0.455 (c) 455 (d) 45.5
  34. 34.0.22 × 2 — where does the decimal point go? (a) 0.44 (b) 0.0044 (c) 0.044 (d) 4.4
  35. 35.0.77 × 0.3 — where does the decimal point go? (a) 0.231 (b) 2.31 (c) 0.00231 (d) 0.0231
  36. 36.0.24 × 9 — where does the decimal point go? (a) 2.16 (b) 21.6 (c) 0.0216 (d) 0.216
  37. 37.0.79 × 0.4 — where does the decimal point go? (a) 0.0316 (b) 0.316 (c) 0.00316 (d) 3.16
  38. 38.9.4 × 17 — where does the decimal point go? (a) 1.598 (b) 15.98 (c) 1598 (d) 159.8
  39. 39.4.9 × 0.5 — where does the decimal point go? (a) 2.45 (b) 24.5 (c) 0.0245 (d) 0.245
  40. 40.8.1 × 5 — where does the decimal point go? (a) 405 (b) 4.05 (c) 40.5 (d) 0.405

Answer key

  1. 2.592
  2. 18.4
  3. 37.8
  4. 27.36
  5. 45.6
  6. 0.576
  7. 3.76
  8. 0.36
  9. 6.93
  10. 184.9
  11. 0.256
  12. 1.18
  13. 0.32
  14. 0.475
  15. 177.5
  16. 6.9
  17. 57.6
  18. 8.5
  19. 6.3
  20. 7.92
  21. 3.06
  22. 9.45
  23. 6.48
  24. 0.087
  25. 6.09
  26. 2.646
  27. 5.78
  28. 3.57
  29. 4.554
  30. 24.9
  31. 3.168
  32. 2.738
  33. 45.5
  34. 0.44
  35. 0.231
  36. 2.16
  37. 0.316
  38. 159.8
  39. 2.45
  40. 40.5

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