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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 568 · 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. 1.7.9 × 39 — where does the decimal point go? (a) 30.81 (b) 3081 (c) 308.1 (d) 3.081
  2. 2.8.1 × 8 — where does the decimal point go? (a) 64.8 (b) 6.48 (c) 0.648 (d) 648
  3. 3.1.8 × 14 — where does the decimal point go? (a) 0.252 (b) 252 (c) 25.2 (d) 2.52
  4. 4.0.22 × 2 — where does the decimal point go? (a) 4.4 (b) 0.044 (c) 0.0044 (d) 0.44
  5. 5.7.8 × 17 — where does the decimal point go? (a) 1.326 (b) 1326 (c) 13.26 (d) 132.6
  6. 6.9.7 × 0.5 — where does the decimal point go? (a) 0.485 (b) 48.5 (c) 4.85 (d) 0.0485
  7. 7.0.64 × 6 — where does the decimal point go? (a) 38.4 (b) 0.0384 (c) 3.84 (d) 0.384
  8. 8.5.9 × 6 — where does the decimal point go? (a) 3.54 (b) 354 (c) 0.354 (d) 35.4
  9. 9.0.89 × 0.3 — where does the decimal point go? (a) 0.00267 (b) 0.267 (c) 0.0267 (d) 2.67
  10. 10.3.9 × 9 — where does the decimal point go? (a) 3.51 (b) 0.351 (c) 351 (d) 35.1
  11. 11.0.91 × 3.2 — where does the decimal point go? (a) 0.2912 (b) 29.12 (c) 2.912 (d) 0.02912
  12. 12.0.53 × 0.3 — where does the decimal point go? (a) 1.59 (b) 0.0159 (c) 0.159 (d) 0.00159
  13. 13.7.2 × 0.2 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  14. 14.0.13 × 41 — where does the decimal point go? (a) 5.33 (b) 0.0533 (c) 0.533 (d) 53.3
  15. 15.0.31 × 4.2 — where does the decimal point go? (a) 0.01302 (b) 1.302 (c) 0.1302 (d) 13.02
  16. 16.0.33 × 23 — where does the decimal point go? (a) 0.0759 (b) 75.9 (c) 0.759 (d) 7.59
  17. 17.7.1 × 0.6 — where does the decimal point go? (a) 42.6 (b) 0.426 (c) 0.0426 (d) 4.26
  18. 18.2.6 × 7 — where does the decimal point go? (a) 182 (b) 18.2 (c) 1.82 (d) 0.182
  19. 19.9.6 × 0.7 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 0.0672 (d) 67.2
  20. 20.0.56 × 37 — where does the decimal point go? (a) 20.72 (b) 2.072 (c) 0.2072 (d) 207.2
  21. 21.2.2 × 0.8 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 17.6 (d) 0.0176
  22. 22.2.8 × 9 — where does the decimal point go? (a) 25.2 (b) 252 (c) 2.52 (d) 0.252
  23. 23.7.4 × 12 — where does the decimal point go? (a) 888 (b) 8.88 (c) 0.888 (d) 88.8
  24. 24.0.43 × 39 — where does the decimal point go? (a) 0.1677 (b) 16.77 (c) 167.7 (d) 1.677
  25. 25.2.7 × 0.4 — where does the decimal point go? (a) 10.8 (b) 0.108 (c) 0.0108 (d) 1.08
  26. 26.1.2 × 0.3 — where does the decimal point go? (a) 0.036 (b) 0.0036 (c) 3.6 (d) 0.36
  27. 27.2.3 × 0.3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.69 (d) 0.0069
  28. 28.7.3 × 4 — where does the decimal point go? (a) 0.292 (b) 29.2 (c) 2.92 (d) 292
  29. 29.9.3 × 0.3 — where does the decimal point go? (a) 0.0279 (b) 0.279 (c) 2.79 (d) 27.9
  30. 30.6.5 × 2.1 — where does the decimal point go? (a) 136.5 (b) 13.65 (c) 1.365 (d) 0.1365
  31. 31.7.7 × 0.7 — where does the decimal point go? (a) 0.0539 (b) 5.39 (c) 0.539 (d) 53.9
  32. 32.0.87 × 2 — where does the decimal point go? (a) 17.4 (b) 0.174 (c) 0.0174 (d) 1.74
  33. 33.0.85 × 29 — where does the decimal point go? (a) 0.2465 (b) 2.465 (c) 246.5 (d) 24.65
  34. 34.7.1 × 6 — where does the decimal point go? (a) 4.26 (b) 426 (c) 0.426 (d) 42.6
  35. 35.0.19 × 33 — where does the decimal point go? (a) 0.627 (b) 6.27 (c) 62.7 (d) 0.0627
  36. 36.0.19 × 0.7 — where does the decimal point go? (a) 1.33 (b) 0.133 (c) 0.0133 (d) 0.00133
  37. 37.4.5 × 13 — where does the decimal point go? (a) 58.5 (b) 0.585 (c) 585 (d) 5.85
  38. 38.1.9 × 0.3 — where does the decimal point go? (a) 0.057 (b) 0.57 (c) 0.0057 (d) 5.7
  39. 39.3.1 × 2.2 — where does the decimal point go? (a) 6.82 (b) 68.2 (c) 0.682 (d) 0.0682
  40. 40.2.6 × 1.4 — where does the decimal point go? (a) 0.0364 (b) 3.64 (c) 36.4 (d) 0.364

Answer key

  1. 308.1
  2. 64.8
  3. 25.2
  4. 0.44
  5. 132.6
  6. 4.85
  7. 3.84
  8. 35.4
  9. 0.267
  10. 35.1
  11. 2.912
  12. 0.159
  13. 1.44
  14. 5.33
  15. 1.302
  16. 7.59
  17. 4.26
  18. 18.2
  19. 6.72
  20. 20.72
  21. 1.76
  22. 25.2
  23. 88.8
  24. 16.77
  25. 1.08
  26. 0.36
  27. 0.69
  28. 29.2
  29. 2.79
  30. 13.65
  31. 5.39
  32. 1.74
  33. 24.65
  34. 42.6
  35. 6.27
  36. 0.133
  37. 58.5
  38. 0.57
  39. 6.82
  40. 3.64

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