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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 874 · 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. 1.0.98 × 9 — where does the decimal point go? (a) 8.82 (b) 0.882 (c) 88.2 (d) 0.0882
  2. 2.0.56 × 6 — where does the decimal point go? (a) 3.36 (b) 33.6 (c) 0.336 (d) 0.0336
  3. 3.8.4 × 0.9 — where does the decimal point go? (a) 7.56 (b) 0.756 (c) 75.6 (d) 0.0756
  4. 4.9.1 × 2.4 — where does the decimal point go? (a) 0.2184 (b) 21.84 (c) 2.184 (d) 218.4
  5. 5.0.29 × 0.3 — where does the decimal point go? (a) 0.00087 (b) 0.087 (c) 0.0087 (d) 0.87
  6. 6.0.52 × 0.3 — where does the decimal point go? (a) 0.156 (b) 0.00156 (c) 0.0156 (d) 1.56
  7. 7.0.87 × 3 — where does the decimal point go? (a) 0.261 (b) 26.1 (c) 0.0261 (d) 2.61
  8. 8.0.54 × 3 — where does the decimal point go? (a) 0.0162 (b) 0.162 (c) 16.2 (d) 1.62
  9. 9.6.9 × 2 — where does the decimal point go? (a) 1.38 (b) 0.138 (c) 138 (d) 13.8
  10. 10.0.57 × 37 — where does the decimal point go? (a) 0.2109 (b) 210.9 (c) 21.09 (d) 2.109
  11. 11.1.7 × 33 — where does the decimal point go? (a) 0.561 (b) 5.61 (c) 56.1 (d) 561
  12. 12.8.8 × 7 — where does the decimal point go? (a) 61.6 (b) 616 (c) 0.616 (d) 6.16
  13. 13.0.63 × 4 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 25.2 (d) 0.0252
  14. 14.0.42 × 1.9 — where does the decimal point go? (a) 0.00798 (b) 0.798 (c) 0.0798 (d) 7.98
  15. 15.0.59 × 3.9 — where does the decimal point go? (a) 0.02301 (b) 23.01 (c) 0.2301 (d) 2.301
  16. 16.0.22 × 17 — where does the decimal point go? (a) 37.4 (b) 0.0374 (c) 3.74 (d) 0.374
  17. 17.0.78 × 47 — where does the decimal point go? (a) 366.6 (b) 3.666 (c) 36.66 (d) 0.3666
  18. 18.1.9 × 4.1 — where does the decimal point go? (a) 7.79 (b) 0.779 (c) 0.0779 (d) 77.9
  19. 19.2.7 × 0.6 — where does the decimal point go? (a) 0.162 (b) 1.62 (c) 0.0162 (d) 16.2
  20. 20.0.92 × 6 — where does the decimal point go? (a) 0.0552 (b) 5.52 (c) 55.2 (d) 0.552
  21. 21.0.71 × 26 — where does the decimal point go? (a) 1.846 (b) 0.1846 (c) 18.46 (d) 184.6
  22. 22.7.7 × 0.9 — where does the decimal point go? (a) 6.93 (b) 0.0693 (c) 0.693 (d) 69.3
  23. 23.6.5 × 0.7 — where does the decimal point go? (a) 4.55 (b) 0.455 (c) 45.5 (d) 0.0455
  24. 24.5.1 × 3.8 — where does the decimal point go? (a) 0.1938 (b) 19.38 (c) 193.8 (d) 1.938
  25. 25.0.32 × 12 — where does the decimal point go? (a) 0.0384 (b) 0.384 (c) 38.4 (d) 3.84
  26. 26.6.6 × 1.8 — where does the decimal point go? (a) 11.88 (b) 118.8 (c) 1.188 (d) 0.1188
  27. 27.4.5 × 0.3 — where does the decimal point go? (a) 1.35 (b) 0.135 (c) 13.5 (d) 0.0135
  28. 28.0.39 × 1.2 — where does the decimal point go? (a) 0.0468 (b) 0.468 (c) 0.00468 (d) 4.68
  29. 29.7.8 × 8 — where does the decimal point go? (a) 62.4 (b) 624 (c) 0.624 (d) 6.24
  30. 30.9.8 × 0.7 — where does the decimal point go? (a) 68.6 (b) 6.86 (c) 0.0686 (d) 0.686
  31. 31.2.3 × 7 — where does the decimal point go? (a) 1.61 (b) 16.1 (c) 0.161 (d) 161
  32. 32.9.8 × 1.4 — where does the decimal point go? (a) 0.1372 (b) 137.2 (c) 1.372 (d) 13.72
  33. 33.8.3 × 9 — where does the decimal point go? (a) 747 (b) 7.47 (c) 74.7 (d) 0.747
  34. 34.0.41 × 3 — where does the decimal point go? (a) 0.123 (b) 0.0123 (c) 12.3 (d) 1.23
  35. 35.6.2 × 0.4 — where does the decimal point go? (a) 2.48 (b) 0.248 (c) 24.8 (d) 0.0248
  36. 36.0.45 × 2.1 — where does the decimal point go? (a) 0.0945 (b) 9.45 (c) 0.00945 (d) 0.945
  37. 37.1.3 × 0.8 — where does the decimal point go? (a) 1.04 (b) 0.104 (c) 10.4 (d) 0.0104
  38. 38.1.7 × 15 — where does the decimal point go? (a) 2.55 (b) 255 (c) 25.5 (d) 0.255
  39. 39.0.32 × 19 — where does the decimal point go? (a) 0.608 (b) 6.08 (c) 0.0608 (d) 60.8
  40. 40.0.94 × 2.7 — where does the decimal point go? (a) 25.38 (b) 2.538 (c) 0.2538 (d) 0.02538

Answer key

  1. 8.82
  2. 3.36
  3. 7.56
  4. 21.84
  5. 0.087
  6. 0.156
  7. 2.61
  8. 1.62
  9. 13.8
  10. 21.09
  11. 56.1
  12. 61.6
  13. 2.52
  14. 0.798
  15. 2.301
  16. 3.74
  17. 36.66
  18. 7.79
  19. 1.62
  20. 5.52
  21. 18.46
  22. 6.93
  23. 4.55
  24. 19.38
  25. 3.84
  26. 11.88
  27. 1.35
  28. 0.468
  29. 62.4
  30. 6.86
  31. 16.1
  32. 13.72
  33. 74.7
  34. 1.23
  35. 2.48
  36. 0.945
  37. 1.04
  38. 25.5
  39. 6.08
  40. 2.538

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