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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 382 · 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. 1.6.2 × 44 — where does the decimal point go? (a) 272.8 (b) 2728 (c) 27.28 (d) 2.728
  2. 2.6.4 × 2 — where does the decimal point go? (a) 0.128 (b) 128 (c) 12.8 (d) 1.28
  3. 3.1.7 × 45 — where does the decimal point go? (a) 0.765 (b) 76.5 (c) 765 (d) 7.65
  4. 4.3.9 × 3.1 — where does the decimal point go? (a) 120.9 (b) 0.1209 (c) 1.209 (d) 12.09
  5. 5.0.74 × 2 — where does the decimal point go? (a) 0.148 (b) 0.0148 (c) 14.8 (d) 1.48
  6. 6.0.51 × 3.1 — where does the decimal point go? (a) 0.1581 (b) 0.01581 (c) 15.81 (d) 1.581
  7. 7.0.44 × 3.6 — where does the decimal point go? (a) 0.1584 (b) 0.01584 (c) 15.84 (d) 1.584
  8. 8.4.7 × 0.6 — where does the decimal point go? (a) 2.82 (b) 28.2 (c) 0.0282 (d) 0.282
  9. 9.9.4 × 0.4 — where does the decimal point go? (a) 37.6 (b) 0.376 (c) 0.0376 (d) 3.76
  10. 10.3.8 × 0.4 — where does the decimal point go? (a) 1.52 (b) 0.0152 (c) 0.152 (d) 15.2
  11. 11.0.17 × 37 — where does the decimal point go? (a) 6.29 (b) 0.629 (c) 62.9 (d) 0.0629
  12. 12.0.56 × 8 — where does the decimal point go? (a) 0.0448 (b) 4.48 (c) 44.8 (d) 0.448
  13. 13.7.3 × 0.4 — where does the decimal point go? (a) 2.92 (b) 0.292 (c) 0.0292 (d) 29.2
  14. 14.0.76 × 6 — where does the decimal point go? (a) 0.0456 (b) 45.6 (c) 4.56 (d) 0.456
  15. 15.9.8 × 1.7 — where does the decimal point go? (a) 1.666 (b) 16.66 (c) 0.1666 (d) 166.6
  16. 16.6.6 × 0.3 — where does the decimal point go? (a) 0.198 (b) 1.98 (c) 19.8 (d) 0.0198
  17. 17.2.5 × 17 — where does the decimal point go? (a) 4.25 (b) 425 (c) 0.425 (d) 42.5
  18. 18.0.64 × 4 — where does the decimal point go? (a) 0.0256 (b) 25.6 (c) 0.256 (d) 2.56
  19. 19.0.17 × 5 — where does the decimal point go? (a) 0.0085 (b) 0.085 (c) 0.85 (d) 8.5
  20. 20.8.8 × 0.8 — where does the decimal point go? (a) 0.704 (b) 70.4 (c) 0.0704 (d) 7.04
  21. 21.5.4 × 6 — where does the decimal point go? (a) 32.4 (b) 3.24 (c) 0.324 (d) 324
  22. 22.4.1 × 0.3 — where does the decimal point go? (a) 12.3 (b) 1.23 (c) 0.0123 (d) 0.123
  23. 23.4.3 × 0.2 — where does the decimal point go? (a) 8.6 (b) 0.86 (c) 0.086 (d) 0.0086
  24. 24.0.21 × 2.5 — where does the decimal point go? (a) 0.00525 (b) 0.525 (c) 5.25 (d) 0.0525
  25. 25.0.89 × 4 — where does the decimal point go? (a) 35.6 (b) 0.0356 (c) 3.56 (d) 0.356
  26. 26.0.83 × 2 — where does the decimal point go? (a) 1.66 (b) 0.0166 (c) 0.166 (d) 16.6
  27. 27.4.2 × 14 — where does the decimal point go? (a) 588 (b) 5.88 (c) 0.588 (d) 58.8
  28. 28.0.46 × 2.8 — where does the decimal point go? (a) 0.01288 (b) 0.1288 (c) 12.88 (d) 1.288
  29. 29.0.27 × 0.7 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 0.00189 (d) 1.89
  30. 30.0.73 × 3 — where does the decimal point go? (a) 2.19 (b) 0.0219 (c) 21.9 (d) 0.219
  31. 31.0.38 × 3 — where does the decimal point go? (a) 1.14 (b) 0.114 (c) 11.4 (d) 0.0114
  32. 32.0.52 × 3 — where does the decimal point go? (a) 1.56 (b) 15.6 (c) 0.0156 (d) 0.156
  33. 33.0.16 × 0.2 — where does the decimal point go? (a) 0.032 (b) 0.00032 (c) 0.32 (d) 0.0032
  34. 34.0.12 × 37 — where does the decimal point go? (a) 0.0444 (b) 4.44 (c) 44.4 (d) 0.444
  35. 35.3.3 × 1.4 — where does the decimal point go? (a) 4.62 (b) 46.2 (c) 0.0462 (d) 0.462
  36. 36.2.7 × 1.7 — where does the decimal point go? (a) 0.0459 (b) 4.59 (c) 45.9 (d) 0.459
  37. 37.0.49 × 0.2 — where does the decimal point go? (a) 0.00098 (b) 0.98 (c) 0.0098 (d) 0.098
  38. 38.3.2 × 7 — where does the decimal point go? (a) 2.24 (b) 22.4 (c) 224 (d) 0.224
  39. 39.0.73 × 0.4 — where does the decimal point go? (a) 0.00292 (b) 0.0292 (c) 0.292 (d) 2.92
  40. 40.8.2 × 12 — where does the decimal point go? (a) 0.984 (b) 98.4 (c) 984 (d) 9.84

Answer key

  1. 272.8
  2. 12.8
  3. 76.5
  4. 12.09
  5. 1.48
  6. 1.581
  7. 1.584
  8. 2.82
  9. 3.76
  10. 1.52
  11. 6.29
  12. 4.48
  13. 2.92
  14. 4.56
  15. 16.66
  16. 1.98
  17. 42.5
  18. 2.56
  19. 0.85
  20. 7.04
  21. 32.4
  22. 1.23
  23. 0.86
  24. 0.525
  25. 3.56
  26. 1.66
  27. 58.8
  28. 1.288
  29. 0.189
  30. 2.19
  31. 1.14
  32. 1.56
  33. 0.032
  34. 4.44
  35. 4.62
  36. 4.59
  37. 0.098
  38. 22.4
  39. 0.292
  40. 98.4

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