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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 945 · 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. 1.0.12 × 0.6 — where does the decimal point go? (a) 0.0072 (b) 0.72 (c) 0.00072 (d) 0.072
  2. 2.3.7 × 3 — where does the decimal point go? (a) 11.1 (b) 0.111 (c) 1.11 (d) 111
  3. 3.6.6 × 3 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 19.8 (d) 198
  4. 4.7.3 × 3.4 — where does the decimal point go? (a) 248.2 (b) 2.482 (c) 0.2482 (d) 24.82
  5. 5.2.3 × 38 — where does the decimal point go? (a) 0.874 (b) 87.4 (c) 874 (d) 8.74
  6. 6.7.9 × 0.9 — where does the decimal point go? (a) 71.1 (b) 0.711 (c) 7.11 (d) 0.0711
  7. 7.5.1 × 3 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 15.3 (d) 153
  8. 8.7.4 × 0.3 — where does the decimal point go? (a) 22.2 (b) 0.222 (c) 0.0222 (d) 2.22
  9. 9.0.16 × 37 — where does the decimal point go? (a) 59.2 (b) 5.92 (c) 0.592 (d) 0.0592
  10. 10.1.8 × 0.3 — where does the decimal point go? (a) 0.054 (b) 5.4 (c) 0.0054 (d) 0.54
  11. 11.0.57 × 28 — where does the decimal point go? (a) 15.96 (b) 159.6 (c) 0.1596 (d) 1.596
  12. 12.7.6 × 9 — where does the decimal point go? (a) 6.84 (b) 684 (c) 0.684 (d) 68.4
  13. 13.7.1 × 0.6 — where does the decimal point go? (a) 0.426 (b) 42.6 (c) 0.0426 (d) 4.26
  14. 14.6.4 × 2.2 — where does the decimal point go? (a) 14.08 (b) 0.1408 (c) 140.8 (d) 1.408
  15. 15.0.26 × 4 — where does the decimal point go? (a) 10.4 (b) 1.04 (c) 0.104 (d) 0.0104
  16. 16.9.7 × 0.4 — where does the decimal point go? (a) 0.388 (b) 38.8 (c) 0.0388 (d) 3.88
  17. 17.0.63 × 9 — where does the decimal point go? (a) 5.67 (b) 56.7 (c) 0.567 (d) 0.0567
  18. 18.0.31 × 8 — where does the decimal point go? (a) 0.0248 (b) 2.48 (c) 0.248 (d) 24.8
  19. 19.9.6 × 4.3 — where does the decimal point go? (a) 4.128 (b) 412.8 (c) 0.4128 (d) 41.28
  20. 20.0.84 × 0.6 — where does the decimal point go? (a) 0.0504 (b) 0.00504 (c) 0.504 (d) 5.04
  21. 21.6.4 × 38 — where does the decimal point go? (a) 24.32 (b) 2.432 (c) 243.2 (d) 2432
  22. 22.3.8 × 1.2 — where does the decimal point go? (a) 0.456 (b) 4.56 (c) 0.0456 (d) 45.6
  23. 23.4.7 × 38 — where does the decimal point go? (a) 178.6 (b) 17.86 (c) 1786 (d) 1.786
  24. 24.0.33 × 7 — where does the decimal point go? (a) 0.0231 (b) 0.231 (c) 2.31 (d) 23.1
  25. 25.0.74 × 0.8 — where does the decimal point go? (a) 0.592 (b) 0.00592 (c) 0.0592 (d) 5.92
  26. 26.0.29 × 3.1 — where does the decimal point go? (a) 0.0899 (b) 0.899 (c) 8.99 (d) 0.00899
  27. 27.4.1 × 5 — where does the decimal point go? (a) 2.05 (b) 205 (c) 20.5 (d) 0.205
  28. 28.6.9 × 6 — where does the decimal point go? (a) 0.414 (b) 414 (c) 41.4 (d) 4.14
  29. 29.0.23 × 0.7 — where does the decimal point go? (a) 0.00161 (b) 0.0161 (c) 1.61 (d) 0.161
  30. 30.0.34 × 8 — where does the decimal point go? (a) 2.72 (b) 0.0272 (c) 0.272 (d) 27.2
  31. 31.7.3 × 28 — where does the decimal point go? (a) 2.044 (b) 204.4 (c) 20.44 (d) 2044
  32. 32.0.88 × 1.3 — where does the decimal point go? (a) 0.1144 (b) 1.144 (c) 0.01144 (d) 11.44
  33. 33.7.3 × 2.3 — where does the decimal point go? (a) 1.679 (b) 0.1679 (c) 167.9 (d) 16.79
  34. 34.0.37 × 4.2 — where does the decimal point go? (a) 0.1554 (b) 1.554 (c) 15.54 (d) 0.01554
  35. 35.0.82 × 12 — where does the decimal point go? (a) 0.984 (b) 9.84 (c) 98.4 (d) 0.0984
  36. 36.7.9 × 5 — where does the decimal point go? (a) 0.395 (b) 39.5 (c) 3.95 (d) 395
  37. 37.0.38 × 3 — where does the decimal point go? (a) 11.4 (b) 1.14 (c) 0.114 (d) 0.0114
  38. 38.0.93 × 0.4 — where does the decimal point go? (a) 0.0372 (b) 3.72 (c) 0.00372 (d) 0.372
  39. 39.0.53 × 0.6 — where does the decimal point go? (a) 0.00318 (b) 0.0318 (c) 3.18 (d) 0.318
  40. 40.7.1 × 9 — where does the decimal point go? (a) 63.9 (b) 639 (c) 6.39 (d) 0.639

Answer key

  1. 0.072
  2. 11.1
  3. 19.8
  4. 24.82
  5. 87.4
  6. 7.11
  7. 15.3
  8. 2.22
  9. 5.92
  10. 0.54
  11. 15.96
  12. 68.4
  13. 4.26
  14. 14.08
  15. 1.04
  16. 3.88
  17. 5.67
  18. 2.48
  19. 41.28
  20. 0.504
  21. 243.2
  22. 4.56
  23. 178.6
  24. 2.31
  25. 0.592
  26. 0.899
  27. 20.5
  28. 41.4
  29. 0.161
  30. 2.72
  31. 204.4
  32. 1.144
  33. 16.79
  34. 1.554
  35. 9.84
  36. 39.5
  37. 1.14
  38. 0.372
  39. 0.318
  40. 63.9

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