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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 106 · 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. 1.9.3 × 0.6 — where does the decimal point go? (a) 5.58 (b) 0.0558 (c) 55.8 (d) 0.558
  2. 2.3.9 × 5 — where does the decimal point go? (a) 19.5 (b) 0.195 (c) 1.95 (d) 195
  3. 3.0.37 × 0.5 — where does the decimal point go? (a) 0.185 (b) 1.85 (c) 0.00185 (d) 0.0185
  4. 4.6.6 × 42 — where does the decimal point go? (a) 27.72 (b) 277.2 (c) 2772 (d) 2.772
  5. 5.4.1 × 1.1 — where does the decimal point go? (a) 0.0451 (b) 0.451 (c) 4.51 (d) 45.1
  6. 6.0.72 × 7 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 50.4 (d) 5.04
  7. 7.0.46 × 6 — where does the decimal point go? (a) 0.276 (b) 0.0276 (c) 2.76 (d) 27.6
  8. 8.9.7 × 0.8 — where does the decimal point go? (a) 77.6 (b) 7.76 (c) 0.0776 (d) 0.776
  9. 9.3.5 × 0.9 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 0.0315 (d) 0.315
  10. 10.4.7 × 0.8 — where does the decimal point go? (a) 0.0376 (b) 3.76 (c) 37.6 (d) 0.376
  11. 11.0.62 × 1.1 — where does the decimal point go? (a) 0.682 (b) 0.00682 (c) 0.0682 (d) 6.82
  12. 12.0.68 × 36 — where does the decimal point go? (a) 244.8 (b) 2.448 (c) 24.48 (d) 0.2448
  13. 13.0.91 × 3.8 — where does the decimal point go? (a) 0.3458 (b) 34.58 (c) 0.03458 (d) 3.458
  14. 14.2.4 × 8 — where does the decimal point go? (a) 192 (b) 19.2 (c) 0.192 (d) 1.92
  15. 15.1.9 × 17 — where does the decimal point go? (a) 0.323 (b) 323 (c) 32.3 (d) 3.23
  16. 16.3.4 × 18 — where does the decimal point go? (a) 0.612 (b) 6.12 (c) 612 (d) 61.2
  17. 17.0.76 × 1.6 — where does the decimal point go? (a) 0.1216 (b) 0.01216 (c) 1.216 (d) 12.16
  18. 18.7.7 × 0.6 — where does the decimal point go? (a) 0.462 (b) 0.0462 (c) 4.62 (d) 46.2
  19. 19.2.7 × 0.4 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 10.8 (d) 1.08
  20. 20.4.2 × 46 — where does the decimal point go? (a) 1.932 (b) 193.2 (c) 1932 (d) 19.32
  21. 21.5.9 × 34 — where does the decimal point go? (a) 200.6 (b) 20.06 (c) 2.006 (d) 2006
  22. 22.1.8 × 0.3 — where does the decimal point go? (a) 5.4 (b) 0.0054 (c) 0.54 (d) 0.054
  23. 23.2.5 × 1.9 — where does the decimal point go? (a) 47.5 (b) 0.475 (c) 0.0475 (d) 4.75
  24. 24.3.1 × 0.7 — where does the decimal point go? (a) 0.217 (b) 0.0217 (c) 2.17 (d) 21.7
  25. 25.0.28 × 0.7 — where does the decimal point go? (a) 0.0196 (b) 0.00196 (c) 0.196 (d) 1.96
  26. 26.2.4 × 31 — where does the decimal point go? (a) 0.744 (b) 74.4 (c) 744 (d) 7.44
  27. 27.8.1 × 0.7 — where does the decimal point go? (a) 0.0567 (b) 0.567 (c) 56.7 (d) 5.67
  28. 28.8.2 × 13 — where does the decimal point go? (a) 1066 (b) 10.66 (c) 106.6 (d) 1.066
  29. 29.0.91 × 43 — where does the decimal point go? (a) 39.13 (b) 0.3913 (c) 391.3 (d) 3.913
  30. 30.1.9 × 1.7 — where does the decimal point go? (a) 0.323 (b) 32.3 (c) 3.23 (d) 0.0323
  31. 31.0.87 × 3.7 — where does the decimal point go? (a) 0.03219 (b) 0.3219 (c) 3.219 (d) 32.19
  32. 32.8.8 × 9 — where does the decimal point go? (a) 0.792 (b) 79.2 (c) 792 (d) 7.92
  33. 33.3.1 × 1.6 — where does the decimal point go? (a) 0.0496 (b) 0.496 (c) 49.6 (d) 4.96
  34. 34.0.41 × 0.3 — where does the decimal point go? (a) 0.0123 (b) 0.00123 (c) 1.23 (d) 0.123
  35. 35.2.7 × 12 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 324 (d) 3.24
  36. 36.7.4 × 4 — where does the decimal point go? (a) 0.296 (b) 2.96 (c) 29.6 (d) 296
  37. 37.5.2 × 27 — where does the decimal point go? (a) 14.04 (b) 1.404 (c) 140.4 (d) 1404
  38. 38.0.47 × 1.8 — where does the decimal point go? (a) 8.46 (b) 0.00846 (c) 0.0846 (d) 0.846
  39. 39.2.6 × 0.9 — where does the decimal point go? (a) 23.4 (b) 0.234 (c) 0.0234 (d) 2.34
  40. 40.2.4 × 2.7 — where does the decimal point go? (a) 64.8 (b) 6.48 (c) 0.648 (d) 0.0648

Answer key

  1. 5.58
  2. 19.5
  3. 0.185
  4. 277.2
  5. 4.51
  6. 5.04
  7. 2.76
  8. 7.76
  9. 3.15
  10. 3.76
  11. 0.682
  12. 24.48
  13. 3.458
  14. 19.2
  15. 32.3
  16. 61.2
  17. 1.216
  18. 4.62
  19. 1.08
  20. 193.2
  21. 200.6
  22. 0.54
  23. 4.75
  24. 2.17
  25. 0.196
  26. 74.4
  27. 5.67
  28. 106.6
  29. 39.13
  30. 3.23
  31. 3.219
  32. 79.2
  33. 4.96
  34. 0.123
  35. 32.4
  36. 29.6
  37. 140.4
  38. 0.846
  39. 2.34
  40. 6.48

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