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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 12 · 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. 1.0.13 × 4.1 — where does the decimal point go? (a) 0.0533 (b) 0.533 (c) 5.33 (d) 0.00533
  2. 2.1.7 × 4 — where does the decimal point go? (a) 68 (b) 0.068 (c) 6.8 (d) 0.68
  3. 3.8.4 × 2.6 — where does the decimal point go? (a) 0.2184 (b) 218.4 (c) 21.84 (d) 2.184
  4. 4.0.97 × 2.8 — where does the decimal point go? (a) 0.2716 (b) 2.716 (c) 0.02716 (d) 27.16
  5. 5.6.6 × 4 — where does the decimal point go? (a) 0.264 (b) 264 (c) 26.4 (d) 2.64
  6. 6.0.78 × 0.4 — where does the decimal point go? (a) 0.00312 (b) 0.312 (c) 0.0312 (d) 3.12
  7. 7.3.5 × 0.5 — where does the decimal point go? (a) 0.175 (b) 0.0175 (c) 17.5 (d) 1.75
  8. 8.2.5 × 47 — where does the decimal point go? (a) 117.5 (b) 1175 (c) 11.75 (d) 1.175
  9. 9.0.94 × 3 — where does the decimal point go? (a) 0.282 (b) 28.2 (c) 0.0282 (d) 2.82
  10. 10.9.3 × 2 — where does the decimal point go? (a) 18.6 (b) 186 (c) 1.86 (d) 0.186
  11. 11.6.4 × 43 — where does the decimal point go? (a) 275.2 (b) 2.752 (c) 2752 (d) 27.52
  12. 12.3.1 × 9 — where does the decimal point go? (a) 0.279 (b) 2.79 (c) 27.9 (d) 279
  13. 13.0.98 × 0.9 — where does the decimal point go? (a) 0.0882 (b) 0.00882 (c) 0.882 (d) 8.82
  14. 14.0.24 × 2.4 — where does the decimal point go? (a) 5.76 (b) 0.00576 (c) 0.576 (d) 0.0576
  15. 15.0.44 × 0.9 — where does the decimal point go? (a) 0.00396 (b) 0.396 (c) 0.0396 (d) 3.96
  16. 16.9.5 × 41 — where does the decimal point go? (a) 38.95 (b) 3.895 (c) 389.5 (d) 3895
  17. 17.8.2 × 2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 164 (d) 16.4
  18. 18.8.1 × 2.6 — where does the decimal point go? (a) 2.106 (b) 21.06 (c) 210.6 (d) 0.2106
  19. 19.7.4 × 0.9 — where does the decimal point go? (a) 0.0666 (b) 6.66 (c) 66.6 (d) 0.666
  20. 20.4.9 × 3 — where does the decimal point go? (a) 0.147 (b) 1.47 (c) 147 (d) 14.7
  21. 21.1.8 × 0.3 — where does the decimal point go? (a) 0.54 (b) 5.4 (c) 0.0054 (d) 0.054
  22. 22.0.57 × 0.3 — where does the decimal point go? (a) 1.71 (b) 0.0171 (c) 0.00171 (d) 0.171
  23. 23.0.31 × 2.3 — where does the decimal point go? (a) 0.00713 (b) 0.713 (c) 0.0713 (d) 7.13
  24. 24.6.8 × 4.2 — where does the decimal point go? (a) 285.6 (b) 28.56 (c) 0.2856 (d) 2.856
  25. 25.4.8 × 3.2 — where does the decimal point go? (a) 0.1536 (b) 15.36 (c) 1.536 (d) 153.6
  26. 26.1.4 × 9 — where does the decimal point go? (a) 1.26 (b) 0.126 (c) 12.6 (d) 126
  27. 27.0.75 × 9 — where does the decimal point go? (a) 67.5 (b) 0.0675 (c) 0.675 (d) 6.75
  28. 28.7.8 × 2.4 — where does the decimal point go? (a) 1.872 (b) 18.72 (c) 0.1872 (d) 187.2
  29. 29.2.7 × 46 — where does the decimal point go? (a) 12.42 (b) 124.2 (c) 1.242 (d) 1242
  30. 30.8.8 × 0.6 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
  31. 31.1.2 × 9 — where does the decimal point go? (a) 1.08 (b) 10.8 (c) 0.108 (d) 108
  32. 32.6.3 × 0.9 — where does the decimal point go? (a) 0.0567 (b) 56.7 (c) 5.67 (d) 0.567
  33. 33.0.32 × 0.6 — where does the decimal point go? (a) 1.92 (b) 0.00192 (c) 0.0192 (d) 0.192
  34. 34.1.8 × 4.2 — where does the decimal point go? (a) 0.756 (b) 75.6 (c) 7.56 (d) 0.0756
  35. 35.0.17 × 0.2 — where does the decimal point go? (a) 0.034 (b) 0.00034 (c) 0.34 (d) 0.0034
  36. 36.1.3 × 36 — where does the decimal point go? (a) 46.8 (b) 468 (c) 4.68 (d) 0.468
  37. 37.5.1 × 41 — where does the decimal point go? (a) 2091 (b) 2.091 (c) 20.91 (d) 209.1
  38. 38.9.4 × 12 — where does the decimal point go? (a) 1128 (b) 112.8 (c) 11.28 (d) 1.128
  39. 39.2.6 × 0.2 — where does the decimal point go? (a) 0.0052 (b) 5.2 (c) 0.052 (d) 0.52
  40. 40.0.91 × 0.2 — where does the decimal point go? (a) 0.182 (b) 1.82 (c) 0.0182 (d) 0.00182

Answer key

  1. 0.533
  2. 6.8
  3. 21.84
  4. 2.716
  5. 26.4
  6. 0.312
  7. 1.75
  8. 117.5
  9. 2.82
  10. 18.6
  11. 275.2
  12. 27.9
  13. 0.882
  14. 0.576
  15. 0.396
  16. 389.5
  17. 16.4
  18. 21.06
  19. 6.66
  20. 14.7
  21. 0.54
  22. 0.171
  23. 0.713
  24. 28.56
  25. 15.36
  26. 12.6
  27. 6.75
  28. 18.72
  29. 124.2
  30. 5.28
  31. 10.8
  32. 5.67
  33. 0.192
  34. 7.56
  35. 0.034
  36. 46.8
  37. 209.1
  38. 112.8
  39. 0.52
  40. 0.182

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