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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 675 · 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. 1.3.8 × 1.4 — where does the decimal point go? (a) 5.32 (b) 53.2 (c) 0.532 (d) 0.0532
  2. 2.5.4 × 2 — where does the decimal point go? (a) 108 (b) 0.108 (c) 1.08 (d) 10.8
  3. 3.8.1 × 0.7 — where does the decimal point go? (a) 0.567 (b) 5.67 (c) 0.0567 (d) 56.7
  4. 4.0.63 × 0.3 — where does the decimal point go? (a) 0.00189 (b) 0.189 (c) 0.0189 (d) 1.89
  5. 5.0.14 × 0.7 — where does the decimal point go? (a) 0.098 (b) 0.00098 (c) 0.98 (d) 0.0098
  6. 6.7.9 × 22 — where does the decimal point go? (a) 173.8 (b) 1.738 (c) 17.38 (d) 1738
  7. 7.2.6 × 41 — where does the decimal point go? (a) 1.066 (b) 1066 (c) 106.6 (d) 10.66
  8. 8.5.1 × 7 — where does the decimal point go? (a) 35.7 (b) 3.57 (c) 357 (d) 0.357
  9. 9.0.99 × 6 — where does the decimal point go? (a) 5.94 (b) 0.0594 (c) 0.594 (d) 59.4
  10. 10.0.34 × 26 — where does the decimal point go? (a) 0.0884 (b) 8.84 (c) 88.4 (d) 0.884
  11. 11.2.1 × 0.5 — where does the decimal point go? (a) 1.05 (b) 0.105 (c) 10.5 (d) 0.0105
  12. 12.0.49 × 1.6 — where does the decimal point go? (a) 7.84 (b) 0.00784 (c) 0.784 (d) 0.0784
  13. 13.0.72 × 0.6 — where does the decimal point go? (a) 0.00432 (b) 0.432 (c) 0.0432 (d) 4.32
  14. 14.7.1 × 1.6 — where does the decimal point go? (a) 0.1136 (b) 11.36 (c) 1.136 (d) 113.6
  15. 15.0.89 × 3 — where does the decimal point go? (a) 0.267 (b) 0.0267 (c) 2.67 (d) 26.7
  16. 16.0.21 × 3.5 — where does the decimal point go? (a) 0.0735 (b) 0.735 (c) 7.35 (d) 0.00735
  17. 17.0.14 × 33 — where does the decimal point go? (a) 4.62 (b) 0.0462 (c) 46.2 (d) 0.462
  18. 18.0.13 × 4 — where does the decimal point go? (a) 0.0052 (b) 5.2 (c) 0.052 (d) 0.52
  19. 19.0.41 × 3 — where does the decimal point go? (a) 0.123 (b) 1.23 (c) 12.3 (d) 0.0123
  20. 20.0.17 × 14 — where does the decimal point go? (a) 0.0238 (b) 0.238 (c) 23.8 (d) 2.38
  21. 21.7.9 × 0.8 — where does the decimal point go? (a) 63.2 (b) 0.0632 (c) 6.32 (d) 0.632
  22. 22.0.75 × 3 — where does the decimal point go? (a) 0.225 (b) 22.5 (c) 2.25 (d) 0.0225
  23. 23.2.3 × 34 — where does the decimal point go? (a) 78.2 (b) 782 (c) 7.82 (d) 0.782
  24. 24.8.2 × 0.7 — where does the decimal point go? (a) 5.74 (b) 57.4 (c) 0.0574 (d) 0.574
  25. 25.3.8 × 24 — where does the decimal point go? (a) 0.912 (b) 912 (c) 9.12 (d) 91.2
  26. 26.5.8 × 42 — where does the decimal point go? (a) 2436 (b) 243.6 (c) 2.436 (d) 24.36
  27. 27.0.52 × 8 — where does the decimal point go? (a) 0.0416 (b) 0.416 (c) 41.6 (d) 4.16
  28. 28.5.2 × 48 — where does the decimal point go? (a) 2.496 (b) 24.96 (c) 2496 (d) 249.6
  29. 29.0.59 × 27 — where does the decimal point go? (a) 1.593 (b) 15.93 (c) 0.1593 (d) 159.3
  30. 30.0.94 × 3 — where does the decimal point go? (a) 0.0282 (b) 0.282 (c) 2.82 (d) 28.2
  31. 31.1.5 × 0.7 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 0.105 (d) 10.5
  32. 32.3.6 × 16 — where does the decimal point go? (a) 0.576 (b) 576 (c) 5.76 (d) 57.6
  33. 33.6.5 × 5 — where does the decimal point go? (a) 0.325 (b) 325 (c) 3.25 (d) 32.5
  34. 34.0.88 × 2.4 — where does the decimal point go? (a) 0.2112 (b) 0.02112 (c) 2.112 (d) 21.12
  35. 35.0.51 × 0.2 — where does the decimal point go? (a) 0.102 (b) 1.02 (c) 0.0102 (d) 0.00102
  36. 36.0.23 × 3 — where does the decimal point go? (a) 0.0069 (b) 6.9 (c) 0.069 (d) 0.69
  37. 37.9.3 × 3.9 — where does the decimal point go? (a) 362.7 (b) 3.627 (c) 0.3627 (d) 36.27
  38. 38.2.4 × 49 — where does the decimal point go? (a) 1.176 (b) 11.76 (c) 1176 (d) 117.6
  39. 39.9.3 × 2 — where does the decimal point go? (a) 186 (b) 0.186 (c) 1.86 (d) 18.6
  40. 40.0.99 × 2 — where does the decimal point go? (a) 19.8 (b) 1.98 (c) 0.198 (d) 0.0198

Answer key

  1. 5.32
  2. 10.8
  3. 5.67
  4. 0.189
  5. 0.098
  6. 173.8
  7. 106.6
  8. 35.7
  9. 5.94
  10. 8.84
  11. 1.05
  12. 0.784
  13. 0.432
  14. 11.36
  15. 2.67
  16. 0.735
  17. 4.62
  18. 0.52
  19. 1.23
  20. 2.38
  21. 6.32
  22. 2.25
  23. 78.2
  24. 5.74
  25. 91.2
  26. 243.6
  27. 4.16
  28. 249.6
  29. 15.93
  30. 2.82
  31. 1.05
  32. 57.6
  33. 32.5
  34. 2.112
  35. 0.102
  36. 0.69
  37. 36.27
  38. 117.6
  39. 18.6
  40. 1.98

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