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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 691 · 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. 1.1.2 × 48 — where does the decimal point go? (a) 57.6 (b) 0.576 (c) 576 (d) 5.76
  2. 2.0.94 × 4.1 — where does the decimal point go? (a) 0.3854 (b) 3.854 (c) 0.03854 (d) 38.54
  3. 3.3.3 × 5 — where does the decimal point go? (a) 0.165 (b) 165 (c) 16.5 (d) 1.65
  4. 4.3.3 × 3 — where does the decimal point go? (a) 0.99 (b) 9.9 (c) 0.099 (d) 99
  5. 5.0.99 × 5 — where does the decimal point go? (a) 0.0495 (b) 49.5 (c) 4.95 (d) 0.495
  6. 6.7.7 × 0.9 — where does the decimal point go? (a) 6.93 (b) 0.0693 (c) 0.693 (d) 69.3
  7. 7.0.32 × 0.8 — where does the decimal point go? (a) 0.00256 (b) 2.56 (c) 0.256 (d) 0.0256
  8. 8.9.4 × 7 — where does the decimal point go? (a) 6.58 (b) 658 (c) 65.8 (d) 0.658
  9. 9.6.7 × 0.2 — where does the decimal point go? (a) 1.34 (b) 13.4 (c) 0.134 (d) 0.0134
  10. 10.0.48 × 49 — where does the decimal point go? (a) 0.2352 (b) 23.52 (c) 2.352 (d) 235.2
  11. 11.1.7 × 1.2 — where does the decimal point go? (a) 0.0204 (b) 20.4 (c) 0.204 (d) 2.04
  12. 12.0.13 × 14 — where does the decimal point go? (a) 18.2 (b) 0.182 (c) 1.82 (d) 0.0182
  13. 13.4.9 × 0.9 — where does the decimal point go? (a) 0.0441 (b) 4.41 (c) 0.441 (d) 44.1
  14. 14.8.1 × 3 — where does the decimal point go? (a) 24.3 (b) 0.243 (c) 2.43 (d) 243
  15. 15.0.27 × 2.6 — where does the decimal point go? (a) 0.00702 (b) 7.02 (c) 0.0702 (d) 0.702
  16. 16.7.3 × 12 — where does the decimal point go? (a) 87.6 (b) 0.876 (c) 876 (d) 8.76
  17. 17.0.77 × 3 — where does the decimal point go? (a) 0.0231 (b) 23.1 (c) 2.31 (d) 0.231
  18. 18.0.74 × 47 — where does the decimal point go? (a) 34.78 (b) 0.3478 (c) 347.8 (d) 3.478
  19. 19.1.8 × 2.2 — where does the decimal point go? (a) 3.96 (b) 0.0396 (c) 0.396 (d) 39.6
  20. 20.7.8 × 0.6 — where does the decimal point go? (a) 4.68 (b) 0.0468 (c) 0.468 (d) 46.8
  21. 21.0.27 × 6 — where does the decimal point go? (a) 0.0162 (b) 16.2 (c) 0.162 (d) 1.62
  22. 22.8.7 × 37 — where does the decimal point go? (a) 3.219 (b) 32.19 (c) 321.9 (d) 3219
  23. 23.1.9 × 0.2 — where does the decimal point go? (a) 3.8 (b) 0.38 (c) 0.038 (d) 0.0038
  24. 24.6.8 × 17 — where does the decimal point go? (a) 1.156 (b) 11.56 (c) 1156 (d) 115.6
  25. 25.1.5 × 2.1 — where does the decimal point go? (a) 3.15 (b) 31.5 (c) 0.315 (d) 0.0315
  26. 26.8.4 × 0.9 — where does the decimal point go? (a) 75.6 (b) 0.0756 (c) 7.56 (d) 0.756
  27. 27.6.3 × 4.2 — where does the decimal point go? (a) 2.646 (b) 264.6 (c) 0.2646 (d) 26.46
  28. 28.0.71 × 4 — where does the decimal point go? (a) 0.0284 (b) 2.84 (c) 28.4 (d) 0.284
  29. 29.8.4 × 27 — where does the decimal point go? (a) 22.68 (b) 226.8 (c) 2268 (d) 2.268
  30. 30.1.4 × 7 — where does the decimal point go? (a) 0.98 (b) 9.8 (c) 0.098 (d) 98
  31. 31.3.5 × 3 — where does the decimal point go? (a) 10.5 (b) 0.105 (c) 105 (d) 1.05
  32. 32.3.3 × 3.1 — where does the decimal point go? (a) 10.23 (b) 102.3 (c) 1.023 (d) 0.1023
  33. 33.6.9 × 37 — where does the decimal point go? (a) 25.53 (b) 2.553 (c) 2553 (d) 255.3
  34. 34.8.8 × 37 — where does the decimal point go? (a) 32.56 (b) 3.256 (c) 325.6 (d) 3256
  35. 35.0.77 × 0.5 — where does the decimal point go? (a) 3.85 (b) 0.00385 (c) 0.0385 (d) 0.385
  36. 36.0.25 × 4.9 — where does the decimal point go? (a) 1.225 (b) 0.1225 (c) 0.01225 (d) 12.25
  37. 37.0.63 × 5 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.0315 (d) 31.5
  38. 38.6.8 × 46 — where does the decimal point go? (a) 31.28 (b) 3.128 (c) 312.8 (d) 3128
  39. 39.0.85 × 0.5 — where does the decimal point go? (a) 0.425 (b) 4.25 (c) 0.0425 (d) 0.00425
  40. 40.3.4 × 0.2 — where does the decimal point go? (a) 0.0068 (b) 0.068 (c) 6.8 (d) 0.68

Answer key

  1. 57.6
  2. 3.854
  3. 16.5
  4. 9.9
  5. 4.95
  6. 6.93
  7. 0.256
  8. 65.8
  9. 1.34
  10. 23.52
  11. 2.04
  12. 1.82
  13. 4.41
  14. 24.3
  15. 0.702
  16. 87.6
  17. 2.31
  18. 34.78
  19. 3.96
  20. 4.68
  21. 1.62
  22. 321.9
  23. 0.38
  24. 115.6
  25. 3.15
  26. 7.56
  27. 26.46
  28. 2.84
  29. 226.8
  30. 9.8
  31. 10.5
  32. 10.23
  33. 255.3
  34. 325.6
  35. 0.385
  36. 1.225
  37. 3.15
  38. 312.8
  39. 0.425
  40. 0.68

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