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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 873 · 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. 1.4.3 × 6 — where does the decimal point go? (a) 25.8 (b) 0.258 (c) 2.58 (d) 258
  2. 2.0.34 × 9 — where does the decimal point go? (a) 0.0306 (b) 30.6 (c) 0.306 (d) 3.06
  3. 3.5.9 × 15 — where does the decimal point go? (a) 0.885 (b) 8.85 (c) 88.5 (d) 885
  4. 4.0.45 × 9 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 0.405 (d) 40.5
  5. 5.0.21 × 21 — where does the decimal point go? (a) 0.0441 (b) 44.1 (c) 4.41 (d) 0.441
  6. 6.0.54 × 0.3 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 0.00162 (d) 1.62
  7. 7.0.63 × 41 — where does the decimal point go? (a) 258.3 (b) 0.2583 (c) 2.583 (d) 25.83
  8. 8.2.8 × 4.9 — where does the decimal point go? (a) 137.2 (b) 13.72 (c) 0.1372 (d) 1.372
  9. 9.0.76 × 9 — where does the decimal point go? (a) 0.684 (b) 0.0684 (c) 68.4 (d) 6.84
  10. 10.5.1 × 47 — where does the decimal point go? (a) 23.97 (b) 2.397 (c) 239.7 (d) 2397
  11. 11.0.17 × 0.8 — where does the decimal point go? (a) 0.0136 (b) 1.36 (c) 0.00136 (d) 0.136
  12. 12.0.55 × 2.3 — where does the decimal point go? (a) 0.1265 (b) 1.265 (c) 0.01265 (d) 12.65
  13. 13.7.6 × 16 — where does the decimal point go? (a) 1.216 (b) 12.16 (c) 121.6 (d) 1216
  14. 14.2.7 × 48 — where does the decimal point go? (a) 1296 (b) 12.96 (c) 129.6 (d) 1.296
  15. 15.5.5 × 49 — where does the decimal point go? (a) 2.695 (b) 269.5 (c) 2695 (d) 26.95
  16. 16.5.6 × 2.7 — where does the decimal point go? (a) 15.12 (b) 0.1512 (c) 151.2 (d) 1.512
  17. 17.0.37 × 0.4 — where does the decimal point go? (a) 0.148 (b) 1.48 (c) 0.00148 (d) 0.0148
  18. 18.5.3 × 0.5 — where does the decimal point go? (a) 26.5 (b) 0.265 (c) 0.0265 (d) 2.65
  19. 19.0.46 × 19 — where does the decimal point go? (a) 8.74 (b) 87.4 (c) 0.0874 (d) 0.874
  20. 20.0.14 × 4 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
  21. 21.0.79 × 3.3 — where does the decimal point go? (a) 0.2607 (b) 26.07 (c) 2.607 (d) 0.02607
  22. 22.0.63 × 9 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 0.0567 (d) 56.7
  23. 23.3.3 × 0.7 — where does the decimal point go? (a) 2.31 (b) 23.1 (c) 0.0231 (d) 0.231
  24. 24.0.33 × 4.5 — where does the decimal point go? (a) 14.85 (b) 1.485 (c) 0.01485 (d) 0.1485
  25. 25.0.87 × 4.4 — where does the decimal point go? (a) 3.828 (b) 0.03828 (c) 0.3828 (d) 38.28
  26. 26.8.1 × 0.5 — where does the decimal point go? (a) 4.05 (b) 0.405 (c) 0.0405 (d) 40.5
  27. 27.0.23 × 41 — where does the decimal point go? (a) 0.0943 (b) 9.43 (c) 94.3 (d) 0.943
  28. 28.0.61 × 7 — where does the decimal point go? (a) 0.427 (b) 4.27 (c) 42.7 (d) 0.0427
  29. 29.6.6 × 0.9 — where does the decimal point go? (a) 5.94 (b) 0.594 (c) 0.0594 (d) 59.4
  30. 30.9.2 × 2.7 — where does the decimal point go? (a) 2.484 (b) 24.84 (c) 0.2484 (d) 248.4
  31. 31.0.25 × 0.9 — where does the decimal point go? (a) 2.25 (b) 0.00225 (c) 0.0225 (d) 0.225
  32. 32.0.39 × 2.3 — where does the decimal point go? (a) 0.0897 (b) 8.97 (c) 0.897 (d) 0.00897
  33. 33.0.87 × 1.3 — where does the decimal point go? (a) 11.31 (b) 1.131 (c) 0.01131 (d) 0.1131
  34. 34.0.53 × 9 — where does the decimal point go? (a) 0.477 (b) 47.7 (c) 4.77 (d) 0.0477
  35. 35.3.4 × 0.8 — where does the decimal point go? (a) 0.272 (b) 2.72 (c) 27.2 (d) 0.0272
  36. 36.0.13 × 26 — where does the decimal point go? (a) 0.338 (b) 0.0338 (c) 33.8 (d) 3.38
  37. 37.0.58 × 28 — where does the decimal point go? (a) 16.24 (b) 0.1624 (c) 162.4 (d) 1.624
  38. 38.0.96 × 2.2 — where does the decimal point go? (a) 0.2112 (b) 0.02112 (c) 2.112 (d) 21.12
  39. 39.5.4 × 7 — where does the decimal point go? (a) 0.378 (b) 378 (c) 37.8 (d) 3.78
  40. 40.6.7 × 18 — where does the decimal point go? (a) 1.206 (b) 12.06 (c) 1206 (d) 120.6

Answer key

  1. 25.8
  2. 3.06
  3. 88.5
  4. 4.05
  5. 4.41
  6. 0.162
  7. 25.83
  8. 13.72
  9. 6.84
  10. 239.7
  11. 0.136
  12. 1.265
  13. 121.6
  14. 129.6
  15. 269.5
  16. 15.12
  17. 0.148
  18. 2.65
  19. 8.74
  20. 0.56
  21. 2.607
  22. 5.67
  23. 2.31
  24. 1.485
  25. 3.828
  26. 4.05
  27. 9.43
  28. 4.27
  29. 5.94
  30. 24.84
  31. 0.225
  32. 0.897
  33. 1.131
  34. 4.77
  35. 2.72
  36. 3.38
  37. 16.24
  38. 2.112
  39. 37.8
  40. 120.6

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