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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 416 · 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. 1.3.5 × 5 — where does the decimal point go? (a) 175 (b) 1.75 (c) 17.5 (d) 0.175
  2. 2.0.49 × 0.2 — where does the decimal point go? (a) 0.0098 (b) 0.098 (c) 0.00098 (d) 0.98
  3. 3.0.97 × 0.3 — where does the decimal point go? (a) 0.00291 (b) 0.291 (c) 0.0291 (d) 2.91
  4. 4.0.48 × 0.7 — where does the decimal point go? (a) 0.00336 (b) 3.36 (c) 0.0336 (d) 0.336
  5. 5.2.4 × 4.4 — where does the decimal point go? (a) 10.56 (b) 105.6 (c) 0.1056 (d) 1.056
  6. 6.5.6 × 0.9 — where does the decimal point go? (a) 50.4 (b) 5.04 (c) 0.0504 (d) 0.504
  7. 7.3.7 × 0.2 — where does the decimal point go? (a) 0.074 (b) 0.0074 (c) 7.4 (d) 0.74
  8. 8.0.28 × 44 — where does the decimal point go? (a) 123.2 (b) 0.1232 (c) 12.32 (d) 1.232
  9. 9.0.28 × 0.3 — where does the decimal point go? (a) 0.00084 (b) 0.84 (c) 0.0084 (d) 0.084
  10. 10.0.97 × 4.9 — where does the decimal point go? (a) 0.04753 (b) 0.4753 (c) 4.753 (d) 47.53
  11. 11.0.69 × 3.3 — where does the decimal point go? (a) 22.77 (b) 0.2277 (c) 0.02277 (d) 2.277
  12. 12.0.13 × 9 — where does the decimal point go? (a) 11.7 (b) 0.0117 (c) 0.117 (d) 1.17
  13. 13.7.8 × 1.8 — where does the decimal point go? (a) 14.04 (b) 0.1404 (c) 1.404 (d) 140.4
  14. 14.0.27 × 0.4 — where does the decimal point go? (a) 0.00108 (b) 0.108 (c) 1.08 (d) 0.0108
  15. 15.6.8 × 0.8 — where does the decimal point go? (a) 54.4 (b) 0.544 (c) 5.44 (d) 0.0544
  16. 16.0.22 × 1.6 — where does the decimal point go? (a) 0.352 (b) 0.00352 (c) 3.52 (d) 0.0352
  17. 17.7.6 × 0.2 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 15.2 (d) 0.0152
  18. 18.9.8 × 18 — where does the decimal point go? (a) 176.4 (b) 1.764 (c) 17.64 (d) 1764
  19. 19.6.2 × 41 — where does the decimal point go? (a) 25.42 (b) 2542 (c) 2.542 (d) 254.2
  20. 20.0.98 × 17 — where does the decimal point go? (a) 16.66 (b) 166.6 (c) 0.1666 (d) 1.666
  21. 21.0.78 × 39 — where does the decimal point go? (a) 0.3042 (b) 30.42 (c) 304.2 (d) 3.042
  22. 22.0.74 × 7 — where does the decimal point go? (a) 5.18 (b) 0.0518 (c) 0.518 (d) 51.8
  23. 23.1.6 × 2 — where does the decimal point go? (a) 0.32 (b) 32 (c) 0.032 (d) 3.2
  24. 24.0.43 × 3.6 — where does the decimal point go? (a) 0.01548 (b) 1.548 (c) 0.1548 (d) 15.48
  25. 25.0.51 × 0.3 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 0.00153 (d) 0.0153
  26. 26.0.21 × 0.4 — where does the decimal point go? (a) 0.00084 (b) 0.084 (c) 0.84 (d) 0.0084
  27. 27.1.4 × 0.3 — where does the decimal point go? (a) 0.0042 (b) 4.2 (c) 0.042 (d) 0.42
  28. 28.0.13 × 3.2 — where does the decimal point go? (a) 0.00416 (b) 4.16 (c) 0.0416 (d) 0.416
  29. 29.0.46 × 14 — where does the decimal point go? (a) 64.4 (b) 0.644 (c) 0.0644 (d) 6.44
  30. 30.3.1 × 2 — where does the decimal point go? (a) 6.2 (b) 62 (c) 0.62 (d) 0.062
  31. 31.0.81 × 0.7 — where does the decimal point go? (a) 5.67 (b) 0.0567 (c) 0.567 (d) 0.00567
  32. 32.8.2 × 26 — where does the decimal point go? (a) 2132 (b) 213.2 (c) 21.32 (d) 2.132
  33. 33.8.4 × 6 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 504 (d) 5.04
  34. 34.2.7 × 35 — where does the decimal point go? (a) 945 (b) 0.945 (c) 94.5 (d) 9.45
  35. 35.1.3 × 3.4 — where does the decimal point go? (a) 0.442 (b) 0.0442 (c) 4.42 (d) 44.2
  36. 36.8.7 × 1.2 — where does the decimal point go? (a) 1.044 (b) 10.44 (c) 0.1044 (d) 104.4
  37. 37.0.48 × 0.2 — where does the decimal point go? (a) 0.96 (b) 0.00096 (c) 0.0096 (d) 0.096
  38. 38.0.71 × 4 — where does the decimal point go? (a) 0.284 (b) 2.84 (c) 0.0284 (d) 28.4
  39. 39.0.85 × 5 — where does the decimal point go? (a) 4.25 (b) 0.425 (c) 42.5 (d) 0.0425
  40. 40.0.96 × 34 — where does the decimal point go? (a) 3.264 (b) 326.4 (c) 32.64 (d) 0.3264

Answer key

  1. 17.5
  2. 0.098
  3. 0.291
  4. 0.336
  5. 10.56
  6. 5.04
  7. 0.74
  8. 12.32
  9. 0.084
  10. 4.753
  11. 2.277
  12. 1.17
  13. 14.04
  14. 0.108
  15. 5.44
  16. 0.352
  17. 1.52
  18. 176.4
  19. 254.2
  20. 16.66
  21. 30.42
  22. 5.18
  23. 3.2
  24. 1.548
  25. 0.153
  26. 0.084
  27. 0.42
  28. 0.416
  29. 6.44
  30. 6.2
  31. 0.567
  32. 213.2
  33. 50.4
  34. 94.5
  35. 4.42
  36. 10.44
  37. 0.096
  38. 2.84
  39. 4.25
  40. 32.64

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