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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 134 · 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. 1.6.8 × 0.2 — where does the decimal point go? (a) 0.0136 (b) 13.6 (c) 1.36 (d) 0.136
  2. 2.1.7 × 22 — where does the decimal point go? (a) 0.374 (b) 374 (c) 3.74 (d) 37.4
  3. 3.3.1 × 0.3 — where does the decimal point go? (a) 0.0093 (b) 0.93 (c) 9.3 (d) 0.093
  4. 4.9.4 × 4 — where does the decimal point go? (a) 37.6 (b) 3.76 (c) 0.376 (d) 376
  5. 5.4.7 × 0.5 — where does the decimal point go? (a) 2.35 (b) 23.5 (c) 0.0235 (d) 0.235
  6. 6.0.29 × 14 — where does the decimal point go? (a) 0.406 (b) 4.06 (c) 0.0406 (d) 40.6
  7. 7.2.5 × 7 — where does the decimal point go? (a) 0.175 (b) 17.5 (c) 175 (d) 1.75
  8. 8.8.8 × 2 — where does the decimal point go? (a) 1.76 (b) 176 (c) 17.6 (d) 0.176
  9. 9.9.5 × 3 — where does the decimal point go? (a) 2.85 (b) 285 (c) 0.285 (d) 28.5
  10. 10.7.9 × 15 — where does the decimal point go? (a) 1.185 (b) 1185 (c) 11.85 (d) 118.5
  11. 11.6.7 × 41 — where does the decimal point go? (a) 2.747 (b) 27.47 (c) 2747 (d) 274.7
  12. 12.6.7 × 0.9 — where does the decimal point go? (a) 60.3 (b) 0.603 (c) 6.03 (d) 0.0603
  13. 13.3.2 × 8 — where does the decimal point go? (a) 0.256 (b) 256 (c) 25.6 (d) 2.56
  14. 14.0.61 × 0.7 — where does the decimal point go? (a) 0.0427 (b) 0.00427 (c) 0.427 (d) 4.27
  15. 15.0.51 × 3.4 — where does the decimal point go? (a) 0.1734 (b) 1.734 (c) 17.34 (d) 0.01734
  16. 16.0.42 × 6 — where does the decimal point go? (a) 0.0252 (b) 25.2 (c) 2.52 (d) 0.252
  17. 17.2.9 × 8 — where does the decimal point go? (a) 0.232 (b) 2.32 (c) 232 (d) 23.2
  18. 18.0.42 × 1.8 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 0.0756 (d) 0.00756
  19. 19.5.1 × 3.3 — where does the decimal point go? (a) 168.3 (b) 0.1683 (c) 16.83 (d) 1.683
  20. 20.0.32 × 46 — where does the decimal point go? (a) 14.72 (b) 147.2 (c) 0.1472 (d) 1.472
  21. 21.9.2 × 18 — where does the decimal point go? (a) 165.6 (b) 16.56 (c) 1656 (d) 1.656
  22. 22.6.1 × 5 — where does the decimal point go? (a) 30.5 (b) 3.05 (c) 0.305 (d) 305
  23. 23.3.2 × 44 — where does the decimal point go? (a) 140.8 (b) 14.08 (c) 1408 (d) 1.408
  24. 24.0.27 × 3.8 — where does the decimal point go? (a) 1.026 (b) 10.26 (c) 0.01026 (d) 0.1026
  25. 25.2.9 × 2.5 — where does the decimal point go? (a) 7.25 (b) 72.5 (c) 0.725 (d) 0.0725
  26. 26.3.8 × 22 — where does the decimal point go? (a) 8.36 (b) 836 (c) 0.836 (d) 83.6
  27. 27.7.2 × 4.8 — where does the decimal point go? (a) 345.6 (b) 3.456 (c) 34.56 (d) 0.3456
  28. 28.6.5 × 21 — where does the decimal point go? (a) 136.5 (b) 1.365 (c) 1365 (d) 13.65
  29. 29.0.59 × 1.3 — where does the decimal point go? (a) 0.0767 (b) 7.67 (c) 0.00767 (d) 0.767
  30. 30.0.96 × 48 — where does the decimal point go? (a) 460.8 (b) 0.4608 (c) 46.08 (d) 4.608
  31. 31.0.54 × 9 — where does the decimal point go? (a) 0.0486 (b) 0.486 (c) 4.86 (d) 48.6
  32. 32.3.4 × 49 — where does the decimal point go? (a) 1.666 (b) 166.6 (c) 16.66 (d) 1666
  33. 33.9.3 × 24 — where does the decimal point go? (a) 2.232 (b) 223.2 (c) 2232 (d) 22.32
  34. 34.0.52 × 2.9 — where does the decimal point go? (a) 0.01508 (b) 0.1508 (c) 1.508 (d) 15.08
  35. 35.7.2 × 9 — where does the decimal point go? (a) 6.48 (b) 64.8 (c) 0.648 (d) 648
  36. 36.0.81 × 1.7 — where does the decimal point go? (a) 13.77 (b) 0.01377 (c) 0.1377 (d) 1.377
  37. 37.5.6 × 0.9 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 5.04 (d) 50.4
  38. 38.5.1 × 0.6 — where does the decimal point go? (a) 0.0306 (b) 30.6 (c) 0.306 (d) 3.06
  39. 39.5.1 × 7 — where does the decimal point go? (a) 0.357 (b) 35.7 (c) 3.57 (d) 357
  40. 40.8.1 × 2 — where does the decimal point go? (a) 162 (b) 16.2 (c) 1.62 (d) 0.162

Answer key

  1. 1.36
  2. 37.4
  3. 0.93
  4. 37.6
  5. 2.35
  6. 4.06
  7. 17.5
  8. 17.6
  9. 28.5
  10. 118.5
  11. 274.7
  12. 6.03
  13. 25.6
  14. 0.427
  15. 1.734
  16. 2.52
  17. 23.2
  18. 0.756
  19. 16.83
  20. 14.72
  21. 165.6
  22. 30.5
  23. 140.8
  24. 1.026
  25. 7.25
  26. 83.6
  27. 34.56
  28. 136.5
  29. 0.767
  30. 46.08
  31. 4.86
  32. 166.6
  33. 223.2
  34. 1.508
  35. 64.8
  36. 1.377
  37. 5.04
  38. 3.06
  39. 35.7
  40. 16.2

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