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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 390 · 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. 1.9.3 × 3 — where does the decimal point go? (a) 279 (b) 0.279 (c) 2.79 (d) 27.9
  2. 2.5.7 × 1.2 — where does the decimal point go? (a) 6.84 (b) 0.684 (c) 68.4 (d) 0.0684
  3. 3.3.3 × 2.7 — where does the decimal point go? (a) 89.1 (b) 0.0891 (c) 0.891 (d) 8.91
  4. 4.0.22 × 8 — where does the decimal point go? (a) 0.176 (b) 0.0176 (c) 1.76 (d) 17.6
  5. 5.0.13 × 4.7 — where does the decimal point go? (a) 0.611 (b) 0.0611 (c) 0.00611 (d) 6.11
  6. 6.0.99 × 0.6 — where does the decimal point go? (a) 0.594 (b) 0.00594 (c) 0.0594 (d) 5.94
  7. 7.0.43 × 9 — where does the decimal point go? (a) 38.7 (b) 0.0387 (c) 3.87 (d) 0.387
  8. 8.7.4 × 0.6 — where does the decimal point go? (a) 4.44 (b) 0.0444 (c) 0.444 (d) 44.4
  9. 9.0.61 × 0.2 — where does the decimal point go? (a) 0.0122 (b) 0.00122 (c) 1.22 (d) 0.122
  10. 10.7.9 × 49 — where does the decimal point go? (a) 3.871 (b) 387.1 (c) 38.71 (d) 3871
  11. 11.1.7 × 0.3 — where does the decimal point go? (a) 0.051 (b) 5.1 (c) 0.0051 (d) 0.51
  12. 12.1.3 × 27 — where does the decimal point go? (a) 35.1 (b) 0.351 (c) 3.51 (d) 351
  13. 13.8.1 × 9 — where does the decimal point go? (a) 729 (b) 0.729 (c) 72.9 (d) 7.29
  14. 14.7.6 × 17 — where does the decimal point go? (a) 1.292 (b) 1292 (c) 12.92 (d) 129.2
  15. 15.0.65 × 5 — where does the decimal point go? (a) 3.25 (b) 0.325 (c) 0.0325 (d) 32.5
  16. 16.0.23 × 6 — where does the decimal point go? (a) 13.8 (b) 0.0138 (c) 0.138 (d) 1.38
  17. 17.4.3 × 0.4 — where does the decimal point go? (a) 0.172 (b) 0.0172 (c) 17.2 (d) 1.72
  18. 18.4.7 × 0.6 — where does the decimal point go? (a) 0.282 (b) 0.0282 (c) 2.82 (d) 28.2
  19. 19.0.59 × 0.7 — where does the decimal point go? (a) 0.0413 (b) 0.00413 (c) 0.413 (d) 4.13
  20. 20.0.22 × 4.1 — where does the decimal point go? (a) 0.902 (b) 9.02 (c) 0.0902 (d) 0.00902
  21. 21.0.72 × 7 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 0.0504
  22. 22.1.8 × 13 — where does the decimal point go? (a) 234 (b) 2.34 (c) 23.4 (d) 0.234
  23. 23.1.6 × 4.2 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 0.0672 (d) 67.2
  24. 24.7.4 × 7 — where does the decimal point go? (a) 0.518 (b) 5.18 (c) 518 (d) 51.8
  25. 25.0.88 × 2.2 — where does the decimal point go? (a) 1.936 (b) 0.01936 (c) 19.36 (d) 0.1936
  26. 26.0.14 × 4 — where does the decimal point go? (a) 0.0056 (b) 0.56 (c) 5.6 (d) 0.056
  27. 27.4.4 × 4 — where does the decimal point go? (a) 176 (b) 1.76 (c) 17.6 (d) 0.176
  28. 28.5.3 × 0.7 — where does the decimal point go? (a) 0.0371 (b) 3.71 (c) 37.1 (d) 0.371
  29. 29.0.55 × 3.7 — where does the decimal point go? (a) 2.035 (b) 20.35 (c) 0.2035 (d) 0.02035
  30. 30.7.2 × 4.7 — where does the decimal point go? (a) 33.84 (b) 3.384 (c) 0.3384 (d) 338.4
  31. 31.4.3 × 23 — where does the decimal point go? (a) 9.89 (b) 989 (c) 98.9 (d) 0.989
  32. 32.0.54 × 13 — where does the decimal point go? (a) 70.2 (b) 7.02 (c) 0.702 (d) 0.0702
  33. 33.0.17 × 5 — where does the decimal point go? (a) 0.085 (b) 0.85 (c) 0.0085 (d) 8.5
  34. 34.0.73 × 4 — where does the decimal point go? (a) 29.2 (b) 0.0292 (c) 2.92 (d) 0.292
  35. 35.1.9 × 7 — where does the decimal point go? (a) 0.133 (b) 1.33 (c) 13.3 (d) 133
  36. 36.0.39 × 18 — where does the decimal point go? (a) 70.2 (b) 0.0702 (c) 7.02 (d) 0.702
  37. 37.1.7 × 5 — where does the decimal point go? (a) 0.85 (b) 8.5 (c) 0.085 (d) 85
  38. 38.5.1 × 2 — where does the decimal point go? (a) 102 (b) 10.2 (c) 0.102 (d) 1.02
  39. 39.0.63 × 4.5 — where does the decimal point go? (a) 0.02835 (b) 0.2835 (c) 28.35 (d) 2.835
  40. 40.8.4 × 27 — where does the decimal point go? (a) 2.268 (b) 226.8 (c) 22.68 (d) 2268

Answer key

  1. 27.9
  2. 6.84
  3. 8.91
  4. 1.76
  5. 0.611
  6. 0.594
  7. 3.87
  8. 4.44
  9. 0.122
  10. 387.1
  11. 0.51
  12. 35.1
  13. 72.9
  14. 129.2
  15. 3.25
  16. 1.38
  17. 1.72
  18. 2.82
  19. 0.413
  20. 0.902
  21. 5.04
  22. 23.4
  23. 6.72
  24. 51.8
  25. 1.936
  26. 0.56
  27. 17.6
  28. 3.71
  29. 2.035
  30. 33.84
  31. 98.9
  32. 7.02
  33. 0.85
  34. 2.92
  35. 13.3
  36. 7.02
  37. 8.5
  38. 10.2
  39. 2.835
  40. 226.8

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