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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 240 · 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. 1.0.72 × 3.6 — where does the decimal point go? (a) 0.02592 (b) 0.2592 (c) 2.592 (d) 25.92
  2. 2.1.2 × 4 — where does the decimal point go? (a) 0.48 (b) 4.8 (c) 48 (d) 0.048
  3. 3.0.69 × 7 — where does the decimal point go? (a) 0.0483 (b) 0.483 (c) 4.83 (d) 48.3
  4. 4.0.66 × 9 — where does the decimal point go? (a) 59.4 (b) 5.94 (c) 0.0594 (d) 0.594
  5. 5.0.27 × 0.9 — where does the decimal point go? (a) 0.00243 (b) 0.0243 (c) 2.43 (d) 0.243
  6. 6.6.1 × 0.7 — where does the decimal point go? (a) 0.427 (b) 42.7 (c) 0.0427 (d) 4.27
  7. 7.1.4 × 0.2 — where does the decimal point go? (a) 2.8 (b) 0.028 (c) 0.0028 (d) 0.28
  8. 8.0.46 × 9 — where does the decimal point go? (a) 0.414 (b) 4.14 (c) 0.0414 (d) 41.4
  9. 9.0.46 × 3.2 — where does the decimal point go? (a) 0.1472 (b) 1.472 (c) 0.01472 (d) 14.72
  10. 10.2.6 × 8 — where does the decimal point go? (a) 2.08 (b) 0.208 (c) 208 (d) 20.8
  11. 11.0.18 × 0.2 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 0.0036 (d) 0.00036
  12. 12.0.99 × 0.8 — where does the decimal point go? (a) 0.00792 (b) 0.792 (c) 0.0792 (d) 7.92
  13. 13.3.8 × 3.3 — where does the decimal point go? (a) 12.54 (b) 1.254 (c) 125.4 (d) 0.1254
  14. 14.3.1 × 4.5 — where does the decimal point go? (a) 13.95 (b) 139.5 (c) 1.395 (d) 0.1395
  15. 15.2.1 × 4.1 — where does the decimal point go? (a) 8.61 (b) 0.0861 (c) 0.861 (d) 86.1
  16. 16.6.3 × 0.5 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.0315 (d) 31.5
  17. 17.0.68 × 3 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.0204 (d) 0.204
  18. 18.9.4 × 4 — where does the decimal point go? (a) 0.376 (b) 3.76 (c) 37.6 (d) 376
  19. 19.0.56 × 0.3 — where does the decimal point go? (a) 0.0168 (b) 0.168 (c) 0.00168 (d) 1.68
  20. 20.2.9 × 0.7 — where does the decimal point go? (a) 0.203 (b) 0.0203 (c) 2.03 (d) 20.3
  21. 21.0.97 × 3 — where does the decimal point go? (a) 2.91 (b) 29.1 (c) 0.291 (d) 0.0291
  22. 22.7.7 × 2 — where does the decimal point go? (a) 0.154 (b) 15.4 (c) 1.54 (d) 154
  23. 23.4.1 × 19 — where does the decimal point go? (a) 779 (b) 0.779 (c) 77.9 (d) 7.79
  24. 24.0.57 × 3.3 — where does the decimal point go? (a) 0.1881 (b) 0.01881 (c) 1.881 (d) 18.81
  25. 25.6.2 × 2 — where does the decimal point go? (a) 1.24 (b) 12.4 (c) 0.124 (d) 124
  26. 26.0.22 × 0.2 — where does the decimal point go? (a) 0.44 (b) 0.0044 (c) 0.044 (d) 0.00044
  27. 27.0.68 × 3.1 — where does the decimal point go? (a) 2.108 (b) 0.02108 (c) 21.08 (d) 0.2108
  28. 28.0.97 × 8 — where does the decimal point go? (a) 77.6 (b) 0.0776 (c) 0.776 (d) 7.76
  29. 29.2.8 × 4 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 112 (d) 0.112
  30. 30.0.42 × 3.4 — where does the decimal point go? (a) 14.28 (b) 0.1428 (c) 1.428 (d) 0.01428
  31. 31.5.9 × 4 — where does the decimal point go? (a) 23.6 (b) 2.36 (c) 0.236 (d) 236
  32. 32.0.76 × 1.3 — where does the decimal point go? (a) 0.988 (b) 0.0988 (c) 9.88 (d) 0.00988
  33. 33.0.53 × 18 — where does the decimal point go? (a) 9.54 (b) 0.954 (c) 95.4 (d) 0.0954
  34. 34.1.6 × 2.1 — where does the decimal point go? (a) 33.6 (b) 0.0336 (c) 0.336 (d) 3.36
  35. 35.0.49 × 4.6 — where does the decimal point go? (a) 2.254 (b) 22.54 (c) 0.02254 (d) 0.2254
  36. 36.9.2 × 31 — where does the decimal point go? (a) 2852 (b) 28.52 (c) 285.2 (d) 2.852
  37. 37.0.17 × 3.3 — where does the decimal point go? (a) 5.61 (b) 0.00561 (c) 0.561 (d) 0.0561
  38. 38.2.4 × 0.7 — where does the decimal point go? (a) 0.0168 (b) 0.168 (c) 16.8 (d) 1.68
  39. 39.4.5 × 25 — where does the decimal point go? (a) 1125 (b) 1.125 (c) 11.25 (d) 112.5
  40. 40.5.5 × 3 — where does the decimal point go? (a) 0.165 (b) 16.5 (c) 1.65 (d) 165

Answer key

  1. 2.592
  2. 4.8
  3. 4.83
  4. 5.94
  5. 0.243
  6. 4.27
  7. 0.28
  8. 4.14
  9. 1.472
  10. 20.8
  11. 0.036
  12. 0.792
  13. 12.54
  14. 13.95
  15. 8.61
  16. 3.15
  17. 2.04
  18. 37.6
  19. 0.168
  20. 2.03
  21. 2.91
  22. 15.4
  23. 77.9
  24. 1.881
  25. 12.4
  26. 0.044
  27. 2.108
  28. 7.76
  29. 11.2
  30. 1.428
  31. 23.6
  32. 0.988
  33. 9.54
  34. 3.36
  35. 2.254
  36. 285.2
  37. 0.561
  38. 1.68
  39. 112.5
  40. 16.5

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