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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 815 · 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. 1.7.7 × 3 — where does the decimal point go? (a) 2.31 (b) 231 (c) 0.231 (d) 23.1
  2. 2.8.5 × 0.7 — where does the decimal point go? (a) 5.95 (b) 59.5 (c) 0.0595 (d) 0.595
  3. 3.0.89 × 32 — where does the decimal point go? (a) 2.848 (b) 0.2848 (c) 28.48 (d) 284.8
  4. 4.0.73 × 0.2 — where does the decimal point go? (a) 0.0146 (b) 1.46 (c) 0.146 (d) 0.00146
  5. 5.0.97 × 19 — where does the decimal point go? (a) 1.843 (b) 0.1843 (c) 184.3 (d) 18.43
  6. 6.1.7 × 35 — where does the decimal point go? (a) 5.95 (b) 59.5 (c) 595 (d) 0.595
  7. 7.4.6 × 1.7 — where does the decimal point go? (a) 78.2 (b) 0.782 (c) 7.82 (d) 0.0782
  8. 8.7.3 × 3 — where does the decimal point go? (a) 21.9 (b) 2.19 (c) 0.219 (d) 219
  9. 9.4.9 × 0.7 — where does the decimal point go? (a) 0.0343 (b) 3.43 (c) 34.3 (d) 0.343
  10. 10.7.1 × 0.5 — where does the decimal point go? (a) 0.0355 (b) 0.355 (c) 3.55 (d) 35.5
  11. 11.1.2 × 2 — where does the decimal point go? (a) 24 (b) 0.024 (c) 0.24 (d) 2.4
  12. 12.6.4 × 3 — where does the decimal point go? (a) 192 (b) 0.192 (c) 19.2 (d) 1.92
  13. 13.3.9 × 4.7 — where does the decimal point go? (a) 1.833 (b) 0.1833 (c) 18.33 (d) 183.3
  14. 14.0.21 × 26 — where does the decimal point go? (a) 0.546 (b) 54.6 (c) 0.0546 (d) 5.46
  15. 15.7.3 × 8 — where does the decimal point go? (a) 58.4 (b) 5.84 (c) 0.584 (d) 584
  16. 16.0.13 × 4.6 — where does the decimal point go? (a) 0.0598 (b) 0.00598 (c) 5.98 (d) 0.598
  17. 17.0.43 × 0.2 — where does the decimal point go? (a) 0.00086 (b) 0.0086 (c) 0.86 (d) 0.086
  18. 18.0.29 × 19 — where does the decimal point go? (a) 55.1 (b) 5.51 (c) 0.0551 (d) 0.551
  19. 19.0.12 × 3 — where does the decimal point go? (a) 3.6 (b) 0.036 (c) 0.0036 (d) 0.36
  20. 20.1.7 × 7 — where does the decimal point go? (a) 1.19 (b) 119 (c) 0.119 (d) 11.9
  21. 21.0.46 × 4.9 — where does the decimal point go? (a) 2.254 (b) 22.54 (c) 0.2254 (d) 0.02254
  22. 22.4.8 × 7 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 336 (d) 33.6
  23. 23.3.3 × 2 — where does the decimal point go? (a) 6.6 (b) 0.066 (c) 0.66 (d) 66
  24. 24.1.4 × 31 — where does the decimal point go? (a) 434 (b) 0.434 (c) 4.34 (d) 43.4
  25. 25.0.12 × 6 — where does the decimal point go? (a) 7.2 (b) 0.072 (c) 0.0072 (d) 0.72
  26. 26.2.9 × 12 — where does the decimal point go? (a) 348 (b) 0.348 (c) 3.48 (d) 34.8
  27. 27.0.39 × 0.8 — where does the decimal point go? (a) 0.00312 (b) 0.0312 (c) 0.312 (d) 3.12
  28. 28.4.4 × 1.2 — where does the decimal point go? (a) 5.28 (b) 52.8 (c) 0.528 (d) 0.0528
  29. 29.2.3 × 47 — where does the decimal point go? (a) 10.81 (b) 108.1 (c) 1.081 (d) 1081
  30. 30.4.4 × 2.1 — where does the decimal point go? (a) 9.24 (b) 0.924 (c) 0.0924 (d) 92.4
  31. 31.6.6 × 0.9 — where does the decimal point go? (a) 5.94 (b) 0.0594 (c) 0.594 (d) 59.4
  32. 32.3.2 × 2.9 — where does the decimal point go? (a) 0.928 (b) 9.28 (c) 0.0928 (d) 92.8
  33. 33.3.9 × 0.6 — where does the decimal point go? (a) 2.34 (b) 0.0234 (c) 23.4 (d) 0.234
  34. 34.0.54 × 1.2 — where does the decimal point go? (a) 0.00648 (b) 6.48 (c) 0.0648 (d) 0.648
  35. 35.1.4 × 1.3 — where does the decimal point go? (a) 1.82 (b) 0.0182 (c) 0.182 (d) 18.2
  36. 36.9.3 × 4 — where does the decimal point go? (a) 37.2 (b) 3.72 (c) 0.372 (d) 372
  37. 37.0.29 × 12 — where does the decimal point go? (a) 3.48 (b) 34.8 (c) 0.348 (d) 0.0348
  38. 38.0.52 × 13 — where does the decimal point go? (a) 67.6 (b) 6.76 (c) 0.0676 (d) 0.676
  39. 39.0.17 × 0.9 — where does the decimal point go? (a) 1.53 (b) 0.0153 (c) 0.00153 (d) 0.153
  40. 40.0.96 × 0.2 — where does the decimal point go? (a) 1.92 (b) 0.00192 (c) 0.0192 (d) 0.192

Answer key

  1. 23.1
  2. 5.95
  3. 28.48
  4. 0.146
  5. 18.43
  6. 59.5
  7. 7.82
  8. 21.9
  9. 3.43
  10. 3.55
  11. 2.4
  12. 19.2
  13. 18.33
  14. 5.46
  15. 58.4
  16. 0.598
  17. 0.086
  18. 5.51
  19. 0.36
  20. 11.9
  21. 2.254
  22. 33.6
  23. 6.6
  24. 43.4
  25. 0.72
  26. 34.8
  27. 0.312
  28. 5.28
  29. 108.1
  30. 9.24
  31. 5.94
  32. 9.28
  33. 2.34
  34. 0.648
  35. 1.82
  36. 37.2
  37. 3.48
  38. 6.76
  39. 0.153
  40. 0.192

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