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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 719 · 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. 1.8.1 × 3 — where does the decimal point go? (a) 0.243 (b) 2.43 (c) 24.3 (d) 243
  2. 2.9.5 × 5 — where does the decimal point go? (a) 0.475 (b) 47.5 (c) 4.75 (d) 475
  3. 3.0.92 × 7 — where does the decimal point go? (a) 0.644 (b) 64.4 (c) 0.0644 (d) 6.44
  4. 4.6.6 × 3.3 — where does the decimal point go? (a) 2.178 (b) 0.2178 (c) 21.78 (d) 217.8
  5. 5.5.4 × 8 — where does the decimal point go? (a) 432 (b) 4.32 (c) 0.432 (d) 43.2
  6. 6.0.88 × 9 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 0.792 (d) 0.0792
  7. 7.0.29 × 3.8 — where does the decimal point go? (a) 0.1102 (b) 1.102 (c) 0.01102 (d) 11.02
  8. 8.0.13 × 1.2 — where does the decimal point go? (a) 0.156 (b) 1.56 (c) 0.00156 (d) 0.0156
  9. 9.0.19 × 44 — where does the decimal point go? (a) 0.0836 (b) 83.6 (c) 8.36 (d) 0.836
  10. 10.0.41 × 2 — where does the decimal point go? (a) 0.082 (b) 0.0082 (c) 0.82 (d) 8.2
  11. 11.0.57 × 25 — where does the decimal point go? (a) 14.25 (b) 0.1425 (c) 1.425 (d) 142.5
  12. 12.0.99 × 1.6 — where does the decimal point go? (a) 1.584 (b) 15.84 (c) 0.1584 (d) 0.01584
  13. 13.0.97 × 1.8 — where does the decimal point go? (a) 0.01746 (b) 0.1746 (c) 17.46 (d) 1.746
  14. 14.0.68 × 1.2 — where does the decimal point go? (a) 0.0816 (b) 0.00816 (c) 0.816 (d) 8.16
  15. 15.0.27 × 2 — where does the decimal point go? (a) 5.4 (b) 0.54 (c) 0.054 (d) 0.0054
  16. 16.8.6 × 3 — where does the decimal point go? (a) 0.258 (b) 2.58 (c) 258 (d) 25.8
  17. 17.3.2 × 1.1 — where does the decimal point go? (a) 0.352 (b) 35.2 (c) 0.0352 (d) 3.52
  18. 18.0.14 × 6 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 0.0084 (d) 8.4
  19. 19.0.58 × 0.3 — where does the decimal point go? (a) 0.174 (b) 0.0174 (c) 0.00174 (d) 1.74
  20. 20.0.58 × 41 — where does the decimal point go? (a) 237.8 (b) 2.378 (c) 0.2378 (d) 23.78
  21. 21.0.91 × 3 — where does the decimal point go? (a) 2.73 (b) 0.273 (c) 0.0273 (d) 27.3
  22. 22.6.7 × 1.3 — where does the decimal point go? (a) 8.71 (b) 0.871 (c) 0.0871 (d) 87.1
  23. 23.3.9 × 2 — where does the decimal point go? (a) 0.78 (b) 0.078 (c) 7.8 (d) 78
  24. 24.3.8 × 0.4 — where does the decimal point go? (a) 0.152 (b) 1.52 (c) 15.2 (d) 0.0152
  25. 25.1.6 × 4.9 — where does the decimal point go? (a) 7.84 (b) 0.784 (c) 78.4 (d) 0.0784
  26. 26.6.6 × 3 — where does the decimal point go? (a) 0.198 (b) 198 (c) 19.8 (d) 1.98
  27. 27.2.4 × 0.2 — where does the decimal point go? (a) 4.8 (b) 0.48 (c) 0.0048 (d) 0.048
  28. 28.0.34 × 3.8 — where does the decimal point go? (a) 1.292 (b) 0.01292 (c) 12.92 (d) 0.1292
  29. 29.2.7 × 41 — where does the decimal point go? (a) 11.07 (b) 110.7 (c) 1.107 (d) 1107
  30. 30.5.3 × 29 — where does the decimal point go? (a) 15.37 (b) 1.537 (c) 153.7 (d) 1537
  31. 31.0.64 × 14 — where does the decimal point go? (a) 89.6 (b) 8.96 (c) 0.896 (d) 0.0896
  32. 32.0.23 × 3.2 — where does the decimal point go? (a) 0.736 (b) 0.0736 (c) 0.00736 (d) 7.36
  33. 33.1.8 × 0.9 — where does the decimal point go? (a) 0.162 (b) 16.2 (c) 0.0162 (d) 1.62
  34. 34.0.91 × 9 — where does the decimal point go? (a) 0.819 (b) 0.0819 (c) 81.9 (d) 8.19
  35. 35.5.4 × 9 — where does the decimal point go? (a) 0.486 (b) 48.6 (c) 4.86 (d) 486
  36. 36.0.18 × 3.7 — where does the decimal point go? (a) 0.666 (b) 0.00666 (c) 0.0666 (d) 6.66
  37. 37.0.64 × 28 — where does the decimal point go? (a) 0.1792 (b) 17.92 (c) 1.792 (d) 179.2
  38. 38.4.7 × 6 — where does the decimal point go? (a) 2.82 (b) 282 (c) 0.282 (d) 28.2
  39. 39.0.18 × 0.3 — where does the decimal point go? (a) 0.0054 (b) 0.054 (c) 0.00054 (d) 0.54
  40. 40.3.1 × 12 — where does the decimal point go? (a) 37.2 (b) 0.372 (c) 372 (d) 3.72

Answer key

  1. 24.3
  2. 47.5
  3. 6.44
  4. 21.78
  5. 43.2
  6. 7.92
  7. 1.102
  8. 0.156
  9. 8.36
  10. 0.82
  11. 14.25
  12. 1.584
  13. 1.746
  14. 0.816
  15. 0.54
  16. 25.8
  17. 3.52
  18. 0.84
  19. 0.174
  20. 23.78
  21. 2.73
  22. 8.71
  23. 7.8
  24. 1.52
  25. 7.84
  26. 19.8
  27. 0.48
  28. 1.292
  29. 110.7
  30. 153.7
  31. 8.96
  32. 0.736
  33. 1.62
  34. 8.19
  35. 48.6
  36. 0.666
  37. 17.92
  38. 28.2
  39. 0.054
  40. 37.2

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