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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 348 · 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. 1.0.84 × 0.6 — where does the decimal point go? (a) 0.504 (b) 0.00504 (c) 5.04 (d) 0.0504
  2. 2.0.56 × 1.7 — where does the decimal point go? (a) 9.52 (b) 0.0952 (c) 0.00952 (d) 0.952
  3. 3.6.1 × 46 — where does the decimal point go? (a) 28.06 (b) 2.806 (c) 280.6 (d) 2806
  4. 4.0.94 × 4.8 — where does the decimal point go? (a) 45.12 (b) 0.4512 (c) 4.512 (d) 0.04512
  5. 5.1.8 × 4 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 7.2 (d) 72
  6. 6.4.5 × 9 — where does the decimal point go? (a) 0.405 (b) 40.5 (c) 4.05 (d) 405
  7. 7.0.16 × 0.4 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 0.00064 (d) 0.0064
  8. 8.6.8 × 3 — where does the decimal point go? (a) 20.4 (b) 204 (c) 0.204 (d) 2.04
  9. 9.0.64 × 0.7 — where does the decimal point go? (a) 4.48 (b) 0.448 (c) 0.0448 (d) 0.00448
  10. 10.0.29 × 27 — where does the decimal point go? (a) 7.83 (b) 0.783 (c) 78.3 (d) 0.0783
  11. 11.4.4 × 3.2 — where does the decimal point go? (a) 140.8 (b) 1.408 (c) 0.1408 (d) 14.08
  12. 12.0.16 × 6 — where does the decimal point go? (a) 9.6 (b) 0.0096 (c) 0.96 (d) 0.096
  13. 13.0.39 × 7 — where does the decimal point go? (a) 0.273 (b) 27.3 (c) 0.0273 (d) 2.73
  14. 14.0.27 × 8 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 0.0216
  15. 15.0.13 × 5 — where does the decimal point go? (a) 0.65 (b) 6.5 (c) 0.0065 (d) 0.065
  16. 16.6.4 × 0.4 — where does the decimal point go? (a) 0.0256 (b) 2.56 (c) 0.256 (d) 25.6
  17. 17.2.7 × 1.6 — where does the decimal point go? (a) 43.2 (b) 4.32 (c) 0.432 (d) 0.0432
  18. 18.1.8 × 0.3 — where does the decimal point go? (a) 0.054 (b) 0.54 (c) 0.0054 (d) 5.4
  19. 19.0.89 × 0.9 — where does the decimal point go? (a) 0.0801 (b) 0.00801 (c) 8.01 (d) 0.801
  20. 20.0.18 × 0.9 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 1.62 (d) 0.00162
  21. 21.0.18 × 3.1 — where does the decimal point go? (a) 0.558 (b) 0.00558 (c) 0.0558 (d) 5.58
  22. 22.0.36 × 13 — where does the decimal point go? (a) 0.468 (b) 4.68 (c) 46.8 (d) 0.0468
  23. 23.0.96 × 19 — where does the decimal point go? (a) 18.24 (b) 0.1824 (c) 182.4 (d) 1.824
  24. 24.7.1 × 38 — where does the decimal point go? (a) 26.98 (b) 269.8 (c) 2.698 (d) 2698
  25. 25.2.9 × 8 — where does the decimal point go? (a) 0.232 (b) 23.2 (c) 232 (d) 2.32
  26. 26.9.2 × 46 — where does the decimal point go? (a) 4.232 (b) 423.2 (c) 4232 (d) 42.32
  27. 27.1.6 × 4 — where does the decimal point go? (a) 6.4 (b) 0.64 (c) 0.064 (d) 64
  28. 28.0.93 × 4.3 — where does the decimal point go? (a) 0.3999 (b) 0.03999 (c) 3.999 (d) 39.99
  29. 29.4.9 × 1.8 — where does the decimal point go? (a) 8.82 (b) 0.0882 (c) 0.882 (d) 88.2
  30. 30.0.36 × 46 — where does the decimal point go? (a) 165.6 (b) 1.656 (c) 16.56 (d) 0.1656
  31. 31.0.77 × 35 — where does the decimal point go? (a) 0.2695 (b) 26.95 (c) 269.5 (d) 2.695
  32. 32.9.4 × 34 — where does the decimal point go? (a) 31.96 (b) 319.6 (c) 3196 (d) 3.196
  33. 33.1.9 × 15 — where does the decimal point go? (a) 28.5 (b) 0.285 (c) 2.85 (d) 285
  34. 34.4.3 × 3 — where does the decimal point go? (a) 0.129 (b) 12.9 (c) 129 (d) 1.29
  35. 35.7.9 × 0.3 — where does the decimal point go? (a) 23.7 (b) 0.0237 (c) 2.37 (d) 0.237
  36. 36.1.7 × 5 — where does the decimal point go? (a) 0.085 (b) 85 (c) 0.85 (d) 8.5
  37. 37.0.82 × 3 — where does the decimal point go? (a) 24.6 (b) 2.46 (c) 0.246 (d) 0.0246
  38. 38.0.34 × 22 — where does the decimal point go? (a) 0.0748 (b) 0.748 (c) 7.48 (d) 74.8
  39. 39.7.9 × 4.4 — where does the decimal point go? (a) 0.3476 (b) 347.6 (c) 3.476 (d) 34.76
  40. 40.5.1 × 5 — where does the decimal point go? (a) 2.55 (b) 25.5 (c) 255 (d) 0.255

Answer key

  1. 0.504
  2. 0.952
  3. 280.6
  4. 4.512
  5. 7.2
  6. 40.5
  7. 0.064
  8. 20.4
  9. 0.448
  10. 7.83
  11. 14.08
  12. 0.96
  13. 2.73
  14. 2.16
  15. 0.65
  16. 2.56
  17. 4.32
  18. 0.54
  19. 0.801
  20. 0.162
  21. 0.558
  22. 4.68
  23. 18.24
  24. 269.8
  25. 23.2
  26. 423.2
  27. 6.4
  28. 3.999
  29. 8.82
  30. 16.56
  31. 26.95
  32. 319.6
  33. 28.5
  34. 12.9
  35. 2.37
  36. 8.5
  37. 2.46
  38. 7.48
  39. 34.76
  40. 25.5

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