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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 285 · 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. 1.7.3 × 0.9 — where does the decimal point go? (a) 6.57 (b) 0.0657 (c) 0.657 (d) 65.7
  2. 2.0.74 × 34 — where does the decimal point go? (a) 0.2516 (b) 25.16 (c) 2.516 (d) 251.6
  3. 3.0.53 × 3 — where does the decimal point go? (a) 15.9 (b) 0.159 (c) 0.0159 (d) 1.59
  4. 4.8.2 × 0.3 — where does the decimal point go? (a) 24.6 (b) 0.0246 (c) 2.46 (d) 0.246
  5. 5.8.1 × 0.2 — where does the decimal point go? (a) 16.2 (b) 0.162 (c) 1.62 (d) 0.0162
  6. 6.0.19 × 0.5 — where does the decimal point go? (a) 0.095 (b) 0.00095 (c) 0.0095 (d) 0.95
  7. 7.0.56 × 12 — where does the decimal point go? (a) 6.72 (b) 67.2 (c) 0.0672 (d) 0.672
  8. 8.0.51 × 0.3 — where does the decimal point go? (a) 0.153 (b) 0.00153 (c) 0.0153 (d) 1.53
  9. 9.0.79 × 2 — where does the decimal point go? (a) 1.58 (b) 15.8 (c) 0.158 (d) 0.0158
  10. 10.0.19 × 0.3 — where does the decimal point go? (a) 0.57 (b) 0.057 (c) 0.00057 (d) 0.0057
  11. 11.8.7 × 2.1 — where does the decimal point go? (a) 1.827 (b) 18.27 (c) 182.7 (d) 0.1827
  12. 12.0.89 × 1.6 — where does the decimal point go? (a) 0.01424 (b) 0.1424 (c) 14.24 (d) 1.424
  13. 13.1.6 × 42 — where does the decimal point go? (a) 6.72 (b) 0.672 (c) 672 (d) 67.2
  14. 14.3.5 × 3 — where does the decimal point go? (a) 10.5 (b) 105 (c) 1.05 (d) 0.105
  15. 15.7.6 × 32 — where does the decimal point go? (a) 2432 (b) 243.2 (c) 24.32 (d) 2.432
  16. 16.0.16 × 3 — where does the decimal point go? (a) 0.0048 (b) 0.48 (c) 0.048 (d) 4.8
  17. 17.8.2 × 2.7 — where does the decimal point go? (a) 0.2214 (b) 2.214 (c) 22.14 (d) 221.4
  18. 18.6.1 × 0.9 — where does the decimal point go? (a) 5.49 (b) 0.549 (c) 0.0549 (d) 54.9
  19. 19.0.72 × 7 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 50.4 (d) 0.0504
  20. 20.0.94 × 9 — where does the decimal point go? (a) 0.846 (b) 84.6 (c) 0.0846 (d) 8.46
  21. 21.0.16 × 24 — where does the decimal point go? (a) 38.4 (b) 3.84 (c) 0.384 (d) 0.0384
  22. 22.1.7 × 0.7 — where does the decimal point go? (a) 0.119 (b) 11.9 (c) 1.19 (d) 0.0119
  23. 23.5.4 × 4.6 — where does the decimal point go? (a) 2.484 (b) 248.4 (c) 0.2484 (d) 24.84
  24. 24.5.1 × 4.7 — where does the decimal point go? (a) 23.97 (b) 0.2397 (c) 239.7 (d) 2.397
  25. 25.7.2 × 4.6 — where does the decimal point go? (a) 331.2 (b) 33.12 (c) 0.3312 (d) 3.312
  26. 26.8.3 × 0.2 — where does the decimal point go? (a) 16.6 (b) 1.66 (c) 0.166 (d) 0.0166
  27. 27.4.2 × 34 — where does the decimal point go? (a) 142.8 (b) 1428 (c) 14.28 (d) 1.428
  28. 28.1.6 × 3 — where does the decimal point go? (a) 0.048 (b) 4.8 (c) 48 (d) 0.48
  29. 29.6.6 × 1.7 — where does the decimal point go? (a) 112.2 (b) 1.122 (c) 0.1122 (d) 11.22
  30. 30.4.3 × 2 — where does the decimal point go? (a) 0.086 (b) 0.86 (c) 8.6 (d) 86
  31. 31.5.5 × 5 — where does the decimal point go? (a) 0.275 (b) 27.5 (c) 275 (d) 2.75
  32. 32.0.69 × 2 — where does the decimal point go? (a) 1.38 (b) 0.138 (c) 0.0138 (d) 13.8
  33. 33.8.9 × 0.3 — where does the decimal point go? (a) 0.0267 (b) 2.67 (c) 0.267 (d) 26.7
  34. 34.9.2 × 49 — where does the decimal point go? (a) 45.08 (b) 4.508 (c) 450.8 (d) 4508
  35. 35.0.39 × 3 — where does the decimal point go? (a) 1.17 (b) 0.117 (c) 11.7 (d) 0.0117
  36. 36.6.3 × 9 — where does the decimal point go? (a) 56.7 (b) 0.567 (c) 567 (d) 5.67
  37. 37.1.9 × 1.8 — where does the decimal point go? (a) 0.342 (b) 0.0342 (c) 34.2 (d) 3.42
  38. 38.1.6 × 6 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 96 (d) 0.96
  39. 39.9.7 × 1.6 — where does the decimal point go? (a) 15.52 (b) 1.552 (c) 155.2 (d) 0.1552
  40. 40.6.9 × 4 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 276 (d) 0.276

Answer key

  1. 6.57
  2. 25.16
  3. 1.59
  4. 2.46
  5. 1.62
  6. 0.095
  7. 6.72
  8. 0.153
  9. 1.58
  10. 0.057
  11. 18.27
  12. 1.424
  13. 67.2
  14. 10.5
  15. 243.2
  16. 0.48
  17. 22.14
  18. 5.49
  19. 5.04
  20. 8.46
  21. 3.84
  22. 1.19
  23. 24.84
  24. 23.97
  25. 33.12
  26. 1.66
  27. 142.8
  28. 4.8
  29. 11.22
  30. 8.6
  31. 27.5
  32. 1.38
  33. 2.67
  34. 450.8
  35. 1.17
  36. 56.7
  37. 3.42
  38. 9.6
  39. 15.52
  40. 27.6

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