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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 799 · 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. 1.0.56 × 0.2 — where does the decimal point go? (a) 1.12 (b) 0.00112 (c) 0.112 (d) 0.0112
  2. 2.0.73 × 21 — where does the decimal point go? (a) 0.1533 (b) 15.33 (c) 153.3 (d) 1.533
  3. 3.0.13 × 1.1 — where does the decimal point go? (a) 0.143 (b) 0.00143 (c) 1.43 (d) 0.0143
  4. 4.1.4 × 0.2 — where does the decimal point go? (a) 0.0028 (b) 0.028 (c) 0.28 (d) 2.8
  5. 5.3.6 × 4 — where does the decimal point go? (a) 144 (b) 0.144 (c) 14.4 (d) 1.44
  6. 6.9.3 × 25 — where does the decimal point go? (a) 23.25 (b) 2.325 (c) 232.5 (d) 2325
  7. 7.8.9 × 22 — where does the decimal point go? (a) 1.958 (b) 19.58 (c) 1958 (d) 195.8
  8. 8.5.8 × 9 — where does the decimal point go? (a) 52.2 (b) 0.522 (c) 522 (d) 5.22
  9. 9.3.8 × 4.2 — where does the decimal point go? (a) 1.596 (b) 15.96 (c) 0.1596 (d) 159.6
  10. 10.3.1 × 0.2 — where does the decimal point go? (a) 0.62 (b) 0.062 (c) 0.0062 (d) 6.2
  11. 11.0.37 × 2.6 — where does the decimal point go? (a) 9.62 (b) 0.0962 (c) 0.962 (d) 0.00962
  12. 12.0.79 × 43 — where does the decimal point go? (a) 3.397 (b) 0.3397 (c) 33.97 (d) 339.7
  13. 13.6.4 × 4 — where does the decimal point go? (a) 256 (b) 0.256 (c) 2.56 (d) 25.6
  14. 14.9.9 × 1.2 — where does the decimal point go? (a) 11.88 (b) 0.1188 (c) 118.8 (d) 1.188
  15. 15.9.3 × 6 — where does the decimal point go? (a) 5.58 (b) 0.558 (c) 558 (d) 55.8
  16. 16.3.3 × 0.5 — where does the decimal point go? (a) 16.5 (b) 1.65 (c) 0.165 (d) 0.0165
  17. 17.7.6 × 4 — where does the decimal point go? (a) 0.304 (b) 3.04 (c) 30.4 (d) 304
  18. 18.0.71 × 2 — where does the decimal point go? (a) 0.0142 (b) 14.2 (c) 1.42 (d) 0.142
  19. 19.2.9 × 17 — where does the decimal point go? (a) 493 (b) 49.3 (c) 0.493 (d) 4.93
  20. 20.3.1 × 13 — where does the decimal point go? (a) 40.3 (b) 0.403 (c) 403 (d) 4.03
  21. 21.0.59 × 25 — where does the decimal point go? (a) 1.475 (b) 14.75 (c) 0.1475 (d) 147.5
  22. 22.3.9 × 9 — where does the decimal point go? (a) 0.351 (b) 35.1 (c) 351 (d) 3.51
  23. 23.6.9 × 0.2 — where does the decimal point go? (a) 13.8 (b) 1.38 (c) 0.138 (d) 0.0138
  24. 24.4.8 × 0.9 — where does the decimal point go? (a) 0.0432 (b) 4.32 (c) 43.2 (d) 0.432
  25. 25.0.13 × 6 — where does the decimal point go? (a) 0.0078 (b) 0.78 (c) 7.8 (d) 0.078
  26. 26.0.76 × 2 — where does the decimal point go? (a) 0.0152 (b) 1.52 (c) 0.152 (d) 15.2
  27. 27.4.2 × 1.1 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 46.2 (d) 0.0462
  28. 28.1.4 × 0.7 — where does the decimal point go? (a) 0.98 (b) 0.0098 (c) 0.098 (d) 9.8
  29. 29.0.49 × 0.7 — where does the decimal point go? (a) 0.0343 (b) 0.00343 (c) 3.43 (d) 0.343
  30. 30.0.99 × 6 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 0.594 (d) 5.94
  31. 31.6.5 × 2.1 — where does the decimal point go? (a) 0.1365 (b) 1.365 (c) 136.5 (d) 13.65
  32. 32.3.4 × 4 — where does the decimal point go? (a) 0.136 (b) 136 (c) 1.36 (d) 13.6
  33. 33.0.52 × 7 — where does the decimal point go? (a) 3.64 (b) 0.364 (c) 0.0364 (d) 36.4
  34. 34.0.53 × 2.2 — where does the decimal point go? (a) 11.66 (b) 1.166 (c) 0.01166 (d) 0.1166
  35. 35.2.4 × 0.7 — where does the decimal point go? (a) 0.0168 (b) 1.68 (c) 16.8 (d) 0.168
  36. 36.0.63 × 2 — where does the decimal point go? (a) 1.26 (b) 0.0126 (c) 12.6 (d) 0.126
  37. 37.7.1 × 8 — where does the decimal point go? (a) 0.568 (b) 5.68 (c) 568 (d) 56.8
  38. 38.0.47 × 19 — where does the decimal point go? (a) 0.0893 (b) 8.93 (c) 0.893 (d) 89.3
  39. 39.9.2 × 43 — where does the decimal point go? (a) 39.56 (b) 3956 (c) 395.6 (d) 3.956
  40. 40.0.65 × 0.5 — where does the decimal point go? (a) 0.00325 (b) 0.0325 (c) 3.25 (d) 0.325

Answer key

  1. 0.112
  2. 15.33
  3. 0.143
  4. 0.28
  5. 14.4
  6. 232.5
  7. 195.8
  8. 52.2
  9. 15.96
  10. 0.62
  11. 0.962
  12. 33.97
  13. 25.6
  14. 11.88
  15. 55.8
  16. 1.65
  17. 30.4
  18. 1.42
  19. 49.3
  20. 40.3
  21. 14.75
  22. 35.1
  23. 1.38
  24. 4.32
  25. 0.78
  26. 1.52
  27. 4.62
  28. 0.98
  29. 0.343
  30. 5.94
  31. 13.65
  32. 13.6
  33. 3.64
  34. 1.166
  35. 1.68
  36. 1.26
  37. 56.8
  38. 8.93
  39. 395.6
  40. 0.325

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