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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 72 · 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. 1.2.3 × 3.3 — where does the decimal point go? (a) 7.59 (b) 75.9 (c) 0.0759 (d) 0.759
  2. 2.0.28 × 8 — where does the decimal point go? (a) 22.4 (b) 0.0224 (c) 0.224 (d) 2.24
  3. 3.0.48 × 0.3 — where does the decimal point go? (a) 0.144 (b) 0.0144 (c) 1.44 (d) 0.00144
  4. 4.0.29 × 2.5 — where does the decimal point go? (a) 0.725 (b) 0.00725 (c) 7.25 (d) 0.0725
  5. 5.7.5 × 5 — where does the decimal point go? (a) 3.75 (b) 37.5 (c) 375 (d) 0.375
  6. 6.8.7 × 8 — where does the decimal point go? (a) 69.6 (b) 6.96 (c) 696 (d) 0.696
  7. 7.0.69 × 3.8 — where does the decimal point go? (a) 2.622 (b) 0.2622 (c) 26.22 (d) 0.02622
  8. 8.0.35 × 0.3 — where does the decimal point go? (a) 1.05 (b) 0.00105 (c) 0.105 (d) 0.0105
  9. 9.0.22 × 3 — where does the decimal point go? (a) 0.066 (b) 0.66 (c) 6.6 (d) 0.0066
  10. 10.0.95 × 25 — where does the decimal point go? (a) 237.5 (b) 23.75 (c) 0.2375 (d) 2.375
  11. 11.7.7 × 5 — where does the decimal point go? (a) 3.85 (b) 385 (c) 38.5 (d) 0.385
  12. 12.5.1 × 26 — where does the decimal point go? (a) 1326 (b) 132.6 (c) 13.26 (d) 1.326
  13. 13.2.1 × 2.4 — where does the decimal point go? (a) 5.04 (b) 50.4 (c) 0.504 (d) 0.0504
  14. 14.0.66 × 16 — where does the decimal point go? (a) 0.1056 (b) 10.56 (c) 1.056 (d) 105.6
  15. 15.0.58 × 18 — where does the decimal point go? (a) 10.44 (b) 104.4 (c) 1.044 (d) 0.1044
  16. 16.1.8 × 31 — where does the decimal point go? (a) 0.558 (b) 55.8 (c) 5.58 (d) 558
  17. 17.0.67 × 9 — where does the decimal point go? (a) 0.0603 (b) 6.03 (c) 0.603 (d) 60.3
  18. 18.8.3 × 0.5 — where does the decimal point go? (a) 41.5 (b) 0.415 (c) 4.15 (d) 0.0415
  19. 19.9.3 × 0.4 — where does the decimal point go? (a) 0.0372 (b) 3.72 (c) 37.2 (d) 0.372
  20. 20.0.39 × 2 — where does the decimal point go? (a) 7.8 (b) 0.78 (c) 0.078 (d) 0.0078
  21. 21.7.5 × 0.3 — where does the decimal point go? (a) 22.5 (b) 0.0225 (c) 0.225 (d) 2.25
  22. 22.0.13 × 0.2 — where does the decimal point go? (a) 0.26 (b) 0.026 (c) 0.00026 (d) 0.0026
  23. 23.7.8 × 0.7 — where does the decimal point go? (a) 54.6 (b) 5.46 (c) 0.546 (d) 0.0546
  24. 24.8.1 × 4.4 — where does the decimal point go? (a) 0.3564 (b) 3.564 (c) 35.64 (d) 356.4
  25. 25.7.9 × 4.9 — where does the decimal point go? (a) 3.871 (b) 38.71 (c) 0.3871 (d) 387.1
  26. 26.0.53 × 3 — where does the decimal point go? (a) 1.59 (b) 0.159 (c) 15.9 (d) 0.0159
  27. 27.0.37 × 2 — where does the decimal point go? (a) 0.074 (b) 0.0074 (c) 0.74 (d) 7.4
  28. 28.2.5 × 3.1 — where does the decimal point go? (a) 77.5 (b) 0.0775 (c) 0.775 (d) 7.75
  29. 29.0.84 × 7 — where does the decimal point go? (a) 58.8 (b) 5.88 (c) 0.588 (d) 0.0588
  30. 30.1.6 × 4.7 — where does the decimal point go? (a) 0.0752 (b) 0.752 (c) 75.2 (d) 7.52
  31. 31.0.41 × 17 — where does the decimal point go? (a) 0.0697 (b) 6.97 (c) 0.697 (d) 69.7
  32. 32.0.21 × 5 — where does the decimal point go? (a) 0.105 (b) 10.5 (c) 0.0105 (d) 1.05
  33. 33.3.1 × 4.7 — where does the decimal point go? (a) 0.1457 (b) 145.7 (c) 1.457 (d) 14.57
  34. 34.0.68 × 0.8 — where does the decimal point go? (a) 5.44 (b) 0.544 (c) 0.00544 (d) 0.0544
  35. 35.4.1 × 1.8 — where does the decimal point go? (a) 73.8 (b) 0.738 (c) 0.0738 (d) 7.38
  36. 36.8.1 × 0.5 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 40.5 (d) 0.405
  37. 37.4.8 × 0.8 — where does the decimal point go? (a) 38.4 (b) 0.384 (c) 0.0384 (d) 3.84
  38. 38.1.8 × 24 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 4.32 (d) 432
  39. 39.0.51 × 4.5 — where does the decimal point go? (a) 2.295 (b) 0.2295 (c) 22.95 (d) 0.02295
  40. 40.0.83 × 0.3 — where does the decimal point go? (a) 0.249 (b) 0.00249 (c) 0.0249 (d) 2.49

Answer key

  1. 7.59
  2. 2.24
  3. 0.144
  4. 0.725
  5. 37.5
  6. 69.6
  7. 2.622
  8. 0.105
  9. 0.66
  10. 23.75
  11. 38.5
  12. 132.6
  13. 5.04
  14. 10.56
  15. 10.44
  16. 55.8
  17. 6.03
  18. 4.15
  19. 3.72
  20. 0.78
  21. 2.25
  22. 0.026
  23. 5.46
  24. 35.64
  25. 38.71
  26. 1.59
  27. 0.74
  28. 7.75
  29. 5.88
  30. 7.52
  31. 6.97
  32. 1.05
  33. 14.57
  34. 0.544
  35. 7.38
  36. 4.05
  37. 3.84
  38. 43.2
  39. 2.295
  40. 0.249

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