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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 887 · 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. 1.0.22 × 42 — where does the decimal point go? (a) 0.924 (b) 0.0924 (c) 9.24 (d) 92.4
  2. 2.6.1 × 2 — where does the decimal point go? (a) 1.22 (b) 122 (c) 12.2 (d) 0.122
  3. 3.0.76 × 32 — where does the decimal point go? (a) 0.2432 (b) 24.32 (c) 243.2 (d) 2.432
  4. 4.4.7 × 4.5 — where does the decimal point go? (a) 211.5 (b) 21.15 (c) 0.2115 (d) 2.115
  5. 5.0.32 × 0.8 — where does the decimal point go? (a) 0.256 (b) 0.00256 (c) 2.56 (d) 0.0256
  6. 6.4.4 × 16 — where does the decimal point go? (a) 704 (b) 70.4 (c) 0.704 (d) 7.04
  7. 7.0.61 × 9 — where does the decimal point go? (a) 0.549 (b) 0.0549 (c) 54.9 (d) 5.49
  8. 8.2.8 × 3 — where does the decimal point go? (a) 0.084 (b) 0.84 (c) 84 (d) 8.4
  9. 9.0.82 × 3.7 — where does the decimal point go? (a) 30.34 (b) 0.03034 (c) 0.3034 (d) 3.034
  10. 10.6.8 × 0.9 — where does the decimal point go? (a) 6.12 (b) 61.2 (c) 0.612 (d) 0.0612
  11. 11.4.6 × 23 — where does the decimal point go? (a) 10.58 (b) 1058 (c) 1.058 (d) 105.8
  12. 12.0.94 × 11 — where does the decimal point go? (a) 1.034 (b) 10.34 (c) 103.4 (d) 0.1034
  13. 13.0.18 × 16 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  14. 14.1.4 × 9 — where does the decimal point go? (a) 0.126 (b) 126 (c) 12.6 (d) 1.26
  15. 15.1.7 × 4.1 — where does the decimal point go? (a) 69.7 (b) 0.697 (c) 6.97 (d) 0.0697
  16. 16.0.56 × 0.7 — where does the decimal point go? (a) 0.0392 (b) 3.92 (c) 0.392 (d) 0.00392
  17. 17.0.74 × 9 — where does the decimal point go? (a) 6.66 (b) 66.6 (c) 0.666 (d) 0.0666
  18. 18.8.5 × 0.9 — where does the decimal point go? (a) 0.765 (b) 76.5 (c) 0.0765 (d) 7.65
  19. 19.0.25 × 3 — where does the decimal point go? (a) 0.75 (b) 0.0075 (c) 0.075 (d) 7.5
  20. 20.0.27 × 3.6 — where does the decimal point go? (a) 0.972 (b) 0.0972 (c) 9.72 (d) 0.00972
  21. 21.8.9 × 0.8 — where does the decimal point go? (a) 7.12 (b) 0.712 (c) 0.0712 (d) 71.2
  22. 22.3.4 × 3 — where does the decimal point go? (a) 0.102 (b) 102 (c) 10.2 (d) 1.02
  23. 23.0.27 × 4.6 — where does the decimal point go? (a) 0.1242 (b) 1.242 (c) 0.01242 (d) 12.42
  24. 24.8.4 × 33 — where does the decimal point go? (a) 277.2 (b) 27.72 (c) 2772 (d) 2.772
  25. 25.5.7 × 0.2 — where does the decimal point go? (a) 0.0114 (b) 1.14 (c) 0.114 (d) 11.4
  26. 26.0.56 × 1.7 — where does the decimal point go? (a) 0.0952 (b) 0.00952 (c) 0.952 (d) 9.52
  27. 27.2.6 × 0.2 — where does the decimal point go? (a) 0.052 (b) 0.52 (c) 5.2 (d) 0.0052
  28. 28.0.54 × 2.7 — where does the decimal point go? (a) 0.01458 (b) 0.1458 (c) 1.458 (d) 14.58
  29. 29.0.51 × 0.7 — where does the decimal point go? (a) 0.00357 (b) 0.357 (c) 3.57 (d) 0.0357
  30. 30.0.17 × 4 — where does the decimal point go? (a) 6.8 (b) 0.068 (c) 0.0068 (d) 0.68
  31. 31.0.98 × 21 — where does the decimal point go? (a) 2.058 (b) 0.2058 (c) 205.8 (d) 20.58
  32. 32.0.88 × 0.8 — where does the decimal point go? (a) 0.704 (b) 0.0704 (c) 7.04 (d) 0.00704
  33. 33.7.3 × 0.6 — where does the decimal point go? (a) 0.438 (b) 43.8 (c) 4.38 (d) 0.0438
  34. 34.6.3 × 12 — where does the decimal point go? (a) 7.56 (b) 75.6 (c) 756 (d) 0.756
  35. 35.5.6 × 2.1 — where does the decimal point go? (a) 0.1176 (b) 11.76 (c) 117.6 (d) 1.176
  36. 36.8.5 × 13 — where does the decimal point go? (a) 11.05 (b) 110.5 (c) 1.105 (d) 1105
  37. 37.0.81 × 14 — where does the decimal point go? (a) 0.1134 (b) 11.34 (c) 113.4 (d) 1.134
  38. 38.5.3 × 0.2 — where does the decimal point go? (a) 1.06 (b) 0.0106 (c) 0.106 (d) 10.6
  39. 39.0.77 × 3 — where does the decimal point go? (a) 0.0231 (b) 23.1 (c) 0.231 (d) 2.31
  40. 40.3.1 × 11 — where does the decimal point go? (a) 3.41 (b) 341 (c) 34.1 (d) 0.341

Answer key

  1. 9.24
  2. 12.2
  3. 24.32
  4. 21.15
  5. 0.256
  6. 70.4
  7. 5.49
  8. 8.4
  9. 3.034
  10. 6.12
  11. 105.8
  12. 10.34
  13. 2.88
  14. 12.6
  15. 6.97
  16. 0.392
  17. 6.66
  18. 7.65
  19. 0.75
  20. 0.972
  21. 7.12
  22. 10.2
  23. 1.242
  24. 277.2
  25. 1.14
  26. 0.952
  27. 0.52
  28. 1.458
  29. 0.357
  30. 0.68
  31. 20.58
  32. 0.704
  33. 4.38
  34. 75.6
  35. 11.76
  36. 110.5
  37. 11.34
  38. 1.06
  39. 2.31
  40. 34.1

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