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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 87 · 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. 1.4.3 × 17 — where does the decimal point go? (a) 731 (b) 0.731 (c) 7.31 (d) 73.1
  2. 2.5.5 × 0.7 — where does the decimal point go? (a) 0.385 (b) 0.0385 (c) 38.5 (d) 3.85
  3. 3.0.99 × 6 — where does the decimal point go? (a) 0.594 (b) 59.4 (c) 5.94 (d) 0.0594
  4. 4.4.9 × 7 — where does the decimal point go? (a) 34.3 (b) 343 (c) 3.43 (d) 0.343
  5. 5.0.13 × 0.9 — where does the decimal point go? (a) 0.00117 (b) 0.0117 (c) 1.17 (d) 0.117
  6. 6.0.76 × 7 — where does the decimal point go? (a) 0.0532 (b) 53.2 (c) 0.532 (d) 5.32
  7. 7.0.83 × 23 — where does the decimal point go? (a) 1.909 (b) 190.9 (c) 0.1909 (d) 19.09
  8. 8.6.3 × 47 — where does the decimal point go? (a) 296.1 (b) 2.961 (c) 29.61 (d) 2961
  9. 9.5.3 × 5 — where does the decimal point go? (a) 2.65 (b) 265 (c) 26.5 (d) 0.265
  10. 10.6.7 × 9 — where does the decimal point go? (a) 60.3 (b) 603 (c) 0.603 (d) 6.03
  11. 11.0.94 × 3.4 — where does the decimal point go? (a) 3.196 (b) 0.3196 (c) 0.03196 (d) 31.96
  12. 12.0.98 × 3 — where does the decimal point go? (a) 2.94 (b) 0.0294 (c) 29.4 (d) 0.294
  13. 13.4.6 × 0.9 — where does the decimal point go? (a) 41.4 (b) 0.414 (c) 4.14 (d) 0.0414
  14. 14.2.7 × 1.2 — where does the decimal point go? (a) 0.0324 (b) 32.4 (c) 0.324 (d) 3.24
  15. 15.0.15 × 47 — where does the decimal point go? (a) 0.705 (b) 70.5 (c) 0.0705 (d) 7.05
  16. 16.7.3 × 1.8 — where does the decimal point go? (a) 0.1314 (b) 131.4 (c) 13.14 (d) 1.314
  17. 17.0.12 × 3.8 — where does the decimal point go? (a) 0.456 (b) 0.00456 (c) 0.0456 (d) 4.56
  18. 18.9.2 × 0.6 — where does the decimal point go? (a) 0.552 (b) 5.52 (c) 0.0552 (d) 55.2
  19. 19.1.4 × 31 — where does the decimal point go? (a) 0.434 (b) 43.4 (c) 434 (d) 4.34
  20. 20.5.6 × 2 — where does the decimal point go? (a) 1.12 (b) 11.2 (c) 0.112 (d) 112
  21. 21.7.3 × 6 — where does the decimal point go? (a) 43.8 (b) 438 (c) 4.38 (d) 0.438
  22. 22.3.1 × 0.2 — where does the decimal point go? (a) 0.62 (b) 0.0062 (c) 0.062 (d) 6.2
  23. 23.7.5 × 3 — where does the decimal point go? (a) 22.5 (b) 225 (c) 2.25 (d) 0.225
  24. 24.5.8 × 0.4 — where does the decimal point go? (a) 23.2 (b) 0.232 (c) 2.32 (d) 0.0232
  25. 25.0.37 × 4.7 — where does the decimal point go? (a) 17.39 (b) 1.739 (c) 0.1739 (d) 0.01739
  26. 26.0.63 × 0.5 — where does the decimal point go? (a) 3.15 (b) 0.0315 (c) 0.315 (d) 0.00315
  27. 27.0.15 × 3 — where does the decimal point go? (a) 0.045 (b) 0.45 (c) 0.0045 (d) 4.5
  28. 28.8.3 × 46 — where does the decimal point go? (a) 38.18 (b) 3818 (c) 381.8 (d) 3.818
  29. 29.0.21 × 4 — where does the decimal point go? (a) 8.4 (b) 0.0084 (c) 0.84 (d) 0.084
  30. 30.0.59 × 43 — where does the decimal point go? (a) 25.37 (b) 2.537 (c) 0.2537 (d) 253.7
  31. 31.0.89 × 5 — where does the decimal point go? (a) 0.445 (b) 0.0445 (c) 44.5 (d) 4.45
  32. 32.1.5 × 0.7 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 0.105 (d) 10.5
  33. 33.3.2 × 0.2 — where does the decimal point go? (a) 6.4 (b) 0.0064 (c) 0.64 (d) 0.064
  34. 34.1.3 × 15 — where does the decimal point go? (a) 19.5 (b) 1.95 (c) 195 (d) 0.195
  35. 35.5.7 × 1.2 — where does the decimal point go? (a) 68.4 (b) 0.0684 (c) 6.84 (d) 0.684
  36. 36.0.48 × 0.8 — where does the decimal point go? (a) 0.0384 (b) 0.00384 (c) 0.384 (d) 3.84
  37. 37.0.99 × 2.6 — where does the decimal point go? (a) 2.574 (b) 0.02574 (c) 0.2574 (d) 25.74
  38. 38.3.3 × 4 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 132 (d) 13.2
  39. 39.0.76 × 9 — where does the decimal point go? (a) 0.684 (b) 6.84 (c) 68.4 (d) 0.0684
  40. 40.0.84 × 0.2 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 0.00168 (d) 0.0168

Answer key

  1. 73.1
  2. 3.85
  3. 5.94
  4. 34.3
  5. 0.117
  6. 5.32
  7. 19.09
  8. 296.1
  9. 26.5
  10. 60.3
  11. 3.196
  12. 2.94
  13. 4.14
  14. 3.24
  15. 7.05
  16. 13.14
  17. 0.456
  18. 5.52
  19. 43.4
  20. 11.2
  21. 43.8
  22. 0.62
  23. 22.5
  24. 2.32
  25. 1.739
  26. 0.315
  27. 0.45
  28. 381.8
  29. 0.84
  30. 25.37
  31. 4.45
  32. 1.05
  33. 0.64
  34. 19.5
  35. 6.84
  36. 0.384
  37. 2.574
  38. 13.2
  39. 6.84
  40. 0.168

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