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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 93 · 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. 1.4.1 × 13 — where does the decimal point go? (a) 533 (b) 0.533 (c) 53.3 (d) 5.33
  2. 2.0.64 × 8 — where does the decimal point go? (a) 0.512 (b) 0.0512 (c) 5.12 (d) 51.2
  3. 3.0.47 × 2 — where does the decimal point go? (a) 0.0094 (b) 9.4 (c) 0.094 (d) 0.94
  4. 4.0.32 × 36 — where does the decimal point go? (a) 1.152 (b) 11.52 (c) 0.1152 (d) 115.2
  5. 5.4.8 × 39 — where does the decimal point go? (a) 187.2 (b) 1.872 (c) 1872 (d) 18.72
  6. 6.6.5 × 37 — where does the decimal point go? (a) 24.05 (b) 2405 (c) 2.405 (d) 240.5
  7. 7.6.2 × 0.3 — where does the decimal point go? (a) 1.86 (b) 0.186 (c) 18.6 (d) 0.0186
  8. 8.0.48 × 12 — where does the decimal point go? (a) 0.576 (b) 5.76 (c) 0.0576 (d) 57.6
  9. 9.0.47 × 8 — where does the decimal point go? (a) 3.76 (b) 0.0376 (c) 0.376 (d) 37.6
  10. 10.0.43 × 0.5 — where does the decimal point go? (a) 2.15 (b) 0.00215 (c) 0.215 (d) 0.0215
  11. 11.0.89 × 4.1 — where does the decimal point go? (a) 0.3649 (b) 3.649 (c) 36.49 (d) 0.03649
  12. 12.1.9 × 0.3 — where does the decimal point go? (a) 0.57 (b) 0.0057 (c) 0.057 (d) 5.7
  13. 13.0.19 × 3.4 — where does the decimal point go? (a) 0.646 (b) 0.0646 (c) 0.00646 (d) 6.46
  14. 14.1.9 × 3 — where does the decimal point go? (a) 0.057 (b) 0.57 (c) 5.7 (d) 57
  15. 15.6.1 × 3 — where does the decimal point go? (a) 183 (b) 1.83 (c) 18.3 (d) 0.183
  16. 16.0.25 × 0.5 — where does the decimal point go? (a) 0.125 (b) 1.25 (c) 0.0125 (d) 0.00125
  17. 17.3.3 × 46 — where does the decimal point go? (a) 15.18 (b) 1518 (c) 1.518 (d) 151.8
  18. 18.3.3 × 4.8 — where does the decimal point go? (a) 1.584 (b) 0.1584 (c) 15.84 (d) 158.4
  19. 19.6.6 × 2.1 — where does the decimal point go? (a) 1.386 (b) 0.1386 (c) 13.86 (d) 138.6
  20. 20.7.3 × 0.8 — where does the decimal point go? (a) 5.84 (b) 58.4 (c) 0.584 (d) 0.0584
  21. 21.9.1 × 3 — where does the decimal point go? (a) 27.3 (b) 0.273 (c) 2.73 (d) 273
  22. 22.6.9 × 4 — where does the decimal point go? (a) 0.276 (b) 276 (c) 27.6 (d) 2.76
  23. 23.8.6 × 17 — where does the decimal point go? (a) 1462 (b) 14.62 (c) 1.462 (d) 146.2
  24. 24.4.6 × 8 — where does the decimal point go? (a) 36.8 (b) 3.68 (c) 368 (d) 0.368
  25. 25.0.42 × 26 — where does the decimal point go? (a) 1.092 (b) 0.1092 (c) 10.92 (d) 109.2
  26. 26.1.8 × 0.8 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  27. 27.5.7 × 0.5 — where does the decimal point go? (a) 0.0285 (b) 0.285 (c) 2.85 (d) 28.5
  28. 28.5.3 × 36 — where does the decimal point go? (a) 1.908 (b) 190.8 (c) 1908 (d) 19.08
  29. 29.7.2 × 13 — where does the decimal point go? (a) 936 (b) 0.936 (c) 9.36 (d) 93.6
  30. 30.1.7 × 3 — where does the decimal point go? (a) 0.051 (b) 0.51 (c) 5.1 (d) 51
  31. 31.7.8 × 0.9 — where does the decimal point go? (a) 70.2 (b) 7.02 (c) 0.702 (d) 0.0702
  32. 32.0.66 × 4.3 — where does the decimal point go? (a) 2.838 (b) 28.38 (c) 0.2838 (d) 0.02838
  33. 33.0.65 × 3.9 — where does the decimal point go? (a) 0.02535 (b) 0.2535 (c) 25.35 (d) 2.535
  34. 34.8.6 × 0.7 — where does the decimal point go? (a) 0.0602 (b) 0.602 (c) 60.2 (d) 6.02
  35. 35.1.3 × 36 — where does the decimal point go? (a) 4.68 (b) 46.8 (c) 468 (d) 0.468
  36. 36.0.15 × 0.9 — where does the decimal point go? (a) 1.35 (b) 0.00135 (c) 0.135 (d) 0.0135
  37. 37.4.3 × 36 — where does the decimal point go? (a) 1548 (b) 154.8 (c) 1.548 (d) 15.48
  38. 38.6.6 × 3.1 — where does the decimal point go? (a) 0.2046 (b) 2.046 (c) 204.6 (d) 20.46
  39. 39.0.16 × 0.8 — where does the decimal point go? (a) 1.28 (b) 0.0128 (c) 0.00128 (d) 0.128
  40. 40.0.76 × 0.6 — where does the decimal point go? (a) 0.0456 (b) 4.56 (c) 0.00456 (d) 0.456

Answer key

  1. 53.3
  2. 5.12
  3. 0.94
  4. 11.52
  5. 187.2
  6. 240.5
  7. 1.86
  8. 5.76
  9. 3.76
  10. 0.215
  11. 3.649
  12. 0.57
  13. 0.646
  14. 5.7
  15. 18.3
  16. 0.125
  17. 151.8
  18. 15.84
  19. 13.86
  20. 5.84
  21. 27.3
  22. 27.6
  23. 146.2
  24. 36.8
  25. 10.92
  26. 1.44
  27. 2.85
  28. 190.8
  29. 93.6
  30. 5.1
  31. 7.02
  32. 2.838
  33. 2.535
  34. 6.02
  35. 46.8
  36. 0.135
  37. 154.8
  38. 20.46
  39. 0.128
  40. 0.456

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