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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 676 · 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. 1.0.39 × 0.8 — where does the decimal point go? (a) 0.0312 (b) 3.12 (c) 0.312 (d) 0.00312
  2. 2.6.4 × 13 — where does the decimal point go? (a) 8.32 (b) 832 (c) 83.2 (d) 0.832
  3. 3.5.5 × 13 — where does the decimal point go? (a) 7.15 (b) 715 (c) 0.715 (d) 71.5
  4. 4.5.2 × 0.3 — where does the decimal point go? (a) 0.156 (b) 0.0156 (c) 1.56 (d) 15.6
  5. 5.5.4 × 1.4 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 0.0756 (d) 75.6
  6. 6.5.7 × 7 — where does the decimal point go? (a) 0.399 (b) 3.99 (c) 39.9 (d) 399
  7. 7.2.1 × 1.7 — where does the decimal point go? (a) 0.357 (b) 35.7 (c) 0.0357 (d) 3.57
  8. 8.5.4 × 36 — where does the decimal point go? (a) 1944 (b) 194.4 (c) 19.44 (d) 1.944
  9. 9.3.1 × 4.8 — where does the decimal point go? (a) 1.488 (b) 14.88 (c) 0.1488 (d) 148.8
  10. 10.7.6 × 2.1 — where does the decimal point go? (a) 15.96 (b) 159.6 (c) 0.1596 (d) 1.596
  11. 11.0.75 × 19 — where does the decimal point go? (a) 14.25 (b) 1.425 (c) 0.1425 (d) 142.5
  12. 12.7.3 × 0.7 — where does the decimal point go? (a) 0.0511 (b) 5.11 (c) 51.1 (d) 0.511
  13. 13.5.4 × 3 — where does the decimal point go? (a) 1.62 (b) 0.162 (c) 162 (d) 16.2
  14. 14.8.4 × 9 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 756 (d) 75.6
  15. 15.0.46 × 2 — where does the decimal point go? (a) 0.0092 (b) 0.092 (c) 0.92 (d) 9.2
  16. 16.7.7 × 3.5 — where does the decimal point go? (a) 26.95 (b) 0.2695 (c) 2.695 (d) 269.5
  17. 17.1.7 × 0.2 — where does the decimal point go? (a) 3.4 (b) 0.034 (c) 0.34 (d) 0.0034
  18. 18.7.9 × 1.8 — where does the decimal point go? (a) 1.422 (b) 14.22 (c) 0.1422 (d) 142.2
  19. 19.0.98 × 11 — where does the decimal point go? (a) 10.78 (b) 107.8 (c) 1.078 (d) 0.1078
  20. 20.0.81 × 45 — where does the decimal point go? (a) 0.3645 (b) 3.645 (c) 364.5 (d) 36.45
  21. 21.8.3 × 0.8 — where does the decimal point go? (a) 0.664 (b) 0.0664 (c) 66.4 (d) 6.64
  22. 22.0.18 × 28 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 5.04 (d) 0.0504
  23. 23.0.83 × 13 — where does the decimal point go? (a) 10.79 (b) 107.9 (c) 1.079 (d) 0.1079
  24. 24.6.6 × 2 — where does the decimal point go? (a) 0.132 (b) 13.2 (c) 1.32 (d) 132
  25. 25.2.7 × 6 — where does the decimal point go? (a) 1.62 (b) 16.2 (c) 0.162 (d) 162
  26. 26.4.5 × 21 — where does the decimal point go? (a) 94.5 (b) 0.945 (c) 945 (d) 9.45
  27. 27.7.7 × 3.1 — where does the decimal point go? (a) 2.387 (b) 23.87 (c) 0.2387 (d) 238.7
  28. 28.1.7 × 2.7 — where does the decimal point go? (a) 0.459 (b) 4.59 (c) 0.0459 (d) 45.9
  29. 29.1.4 × 0.3 — where does the decimal point go? (a) 0.42 (b) 0.042 (c) 0.0042 (d) 4.2
  30. 30.0.59 × 0.7 — where does the decimal point go? (a) 0.413 (b) 0.0413 (c) 0.00413 (d) 4.13
  31. 31.0.83 × 4 — where does the decimal point go? (a) 33.2 (b) 3.32 (c) 0.332 (d) 0.0332
  32. 32.7.7 × 0.7 — where does the decimal point go? (a) 5.39 (b) 0.539 (c) 0.0539 (d) 53.9
  33. 33.0.82 × 7 — where does the decimal point go? (a) 5.74 (b) 0.0574 (c) 0.574 (d) 57.4
  34. 34.8.6 × 1.3 — where does the decimal point go? (a) 1.118 (b) 0.1118 (c) 111.8 (d) 11.18
  35. 35.2.4 × 2.7 — where does the decimal point go? (a) 64.8 (b) 0.0648 (c) 0.648 (d) 6.48
  36. 36.6.9 × 14 — where does the decimal point go? (a) 9.66 (b) 96.6 (c) 966 (d) 0.966
  37. 37.6.1 × 0.6 — where does the decimal point go? (a) 3.66 (b) 0.366 (c) 0.0366 (d) 36.6
  38. 38.7.7 × 1.2 — where does the decimal point go? (a) 0.924 (b) 9.24 (c) 92.4 (d) 0.0924
  39. 39.5.6 × 0.6 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 33.6 (d) 0.0336
  40. 40.1.9 × 3 — where does the decimal point go? (a) 0.57 (b) 5.7 (c) 0.057 (d) 57

Answer key

  1. 0.312
  2. 83.2
  3. 71.5
  4. 1.56
  5. 7.56
  6. 39.9
  7. 3.57
  8. 194.4
  9. 14.88
  10. 15.96
  11. 14.25
  12. 5.11
  13. 16.2
  14. 75.6
  15. 0.92
  16. 26.95
  17. 0.34
  18. 14.22
  19. 10.78
  20. 36.45
  21. 6.64
  22. 5.04
  23. 10.79
  24. 13.2
  25. 16.2
  26. 94.5
  27. 23.87
  28. 4.59
  29. 0.42
  30. 0.413
  31. 3.32
  32. 5.39
  33. 5.74
  34. 11.18
  35. 6.48
  36. 96.6
  37. 3.66
  38. 9.24
  39. 3.36
  40. 5.7

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