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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 115 · 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. 1.3.2 × 2 — where does the decimal point go? (a) 64 (b) 6.4 (c) 0.064 (d) 0.64
  2. 2.0.61 × 18 — where does the decimal point go? (a) 1.098 (b) 109.8 (c) 10.98 (d) 0.1098
  3. 3.0.41 × 33 — where does the decimal point go? (a) 1.353 (b) 0.1353 (c) 13.53 (d) 135.3
  4. 4.0.32 × 47 — where does the decimal point go? (a) 15.04 (b) 150.4 (c) 0.1504 (d) 1.504
  5. 5.0.59 × 0.7 — where does the decimal point go? (a) 4.13 (b) 0.00413 (c) 0.0413 (d) 0.413
  6. 6.3.4 × 3 — where does the decimal point go? (a) 10.2 (b) 102 (c) 0.102 (d) 1.02
  7. 7.0.49 × 4 — where does the decimal point go? (a) 0.0196 (b) 19.6 (c) 1.96 (d) 0.196
  8. 8.1.4 × 9 — where does the decimal point go? (a) 0.126 (b) 12.6 (c) 1.26 (d) 126
  9. 9.0.92 × 0.8 — where does the decimal point go? (a) 7.36 (b) 0.0736 (c) 0.736 (d) 0.00736
  10. 10.0.94 × 8 — where does the decimal point go? (a) 7.52 (b) 0.0752 (c) 0.752 (d) 75.2
  11. 11.2.8 × 2.7 — where does the decimal point go? (a) 0.756 (b) 0.0756 (c) 75.6 (d) 7.56
  12. 12.1.3 × 4.2 — where does the decimal point go? (a) 54.6 (b) 0.0546 (c) 0.546 (d) 5.46
  13. 13.0.57 × 0.6 — where does the decimal point go? (a) 0.342 (b) 0.00342 (c) 3.42 (d) 0.0342
  14. 14.0.49 × 4.3 — where does the decimal point go? (a) 0.2107 (b) 2.107 (c) 0.02107 (d) 21.07
  15. 15.8.8 × 9 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 792 (d) 7.92
  16. 16.2.9 × 9 — where does the decimal point go? (a) 261 (b) 2.61 (c) 0.261 (d) 26.1
  17. 17.0.26 × 7 — where does the decimal point go? (a) 0.0182 (b) 0.182 (c) 18.2 (d) 1.82
  18. 18.0.26 × 0.3 — where does the decimal point go? (a) 0.0078 (b) 0.78 (c) 0.078 (d) 0.00078
  19. 19.0.38 × 2.2 — where does the decimal point go? (a) 0.836 (b) 8.36 (c) 0.0836 (d) 0.00836
  20. 20.0.24 × 6 — where does the decimal point go? (a) 14.4 (b) 0.0144 (c) 0.144 (d) 1.44
  21. 21.8.8 × 7 — where does the decimal point go? (a) 616 (b) 6.16 (c) 61.6 (d) 0.616
  22. 22.4.6 × 0.9 — where does the decimal point go? (a) 0.414 (b) 4.14 (c) 0.0414 (d) 41.4
  23. 23.0.92 × 0.4 — where does the decimal point go? (a) 0.00368 (b) 0.0368 (c) 0.368 (d) 3.68
  24. 24.6.8 × 0.3 — where does the decimal point go? (a) 0.0204 (b) 2.04 (c) 0.204 (d) 20.4
  25. 25.2.2 × 0.2 — where does the decimal point go? (a) 0.44 (b) 0.044 (c) 0.0044 (d) 4.4
  26. 26.0.78 × 18 — where does the decimal point go? (a) 14.04 (b) 0.1404 (c) 140.4 (d) 1.404
  27. 27.8.9 × 1.8 — where does the decimal point go? (a) 1.602 (b) 16.02 (c) 0.1602 (d) 160.2
  28. 28.0.99 × 4 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 3.96 (d) 39.6
  29. 29.0.81 × 0.2 — where does the decimal point go? (a) 1.62 (b) 0.162 (c) 0.0162 (d) 0.00162
  30. 30.0.81 × 3 — where does the decimal point go? (a) 0.243 (b) 2.43 (c) 24.3 (d) 0.0243
  31. 31.2.2 × 2 — where does the decimal point go? (a) 44 (b) 0.044 (c) 0.44 (d) 4.4
  32. 32.1.4 × 2.1 — where does the decimal point go? (a) 29.4 (b) 0.0294 (c) 0.294 (d) 2.94
  33. 33.3.9 × 4.3 — where does the decimal point go? (a) 16.77 (b) 0.1677 (c) 1.677 (d) 167.7
  34. 34.0.46 × 0.4 — where does the decimal point go? (a) 0.00184 (b) 0.184 (c) 0.0184 (d) 1.84
  35. 35.0.26 × 0.2 — where does the decimal point go? (a) 0.0052 (b) 0.052 (c) 0.00052 (d) 0.52
  36. 36.3.8 × 1.7 — where does the decimal point go? (a) 0.646 (b) 6.46 (c) 0.0646 (d) 64.6
  37. 37.2.7 × 39 — where does the decimal point go? (a) 10.53 (b) 1053 (c) 1.053 (d) 105.3
  38. 38.0.39 × 4.9 — where does the decimal point go? (a) 1.911 (b) 19.11 (c) 0.1911 (d) 0.01911
  39. 39.0.12 × 44 — where does the decimal point go? (a) 0.0528 (b) 5.28 (c) 0.528 (d) 52.8
  40. 40.0.16 × 6 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 0.096 (d) 0.0096

Answer key

  1. 6.4
  2. 10.98
  3. 13.53
  4. 15.04
  5. 0.413
  6. 10.2
  7. 1.96
  8. 12.6
  9. 0.736
  10. 7.52
  11. 7.56
  12. 5.46
  13. 0.342
  14. 2.107
  15. 79.2
  16. 26.1
  17. 1.82
  18. 0.078
  19. 0.836
  20. 1.44
  21. 61.6
  22. 4.14
  23. 0.368
  24. 2.04
  25. 0.44
  26. 14.04
  27. 16.02
  28. 3.96
  29. 0.162
  30. 2.43
  31. 4.4
  32. 2.94
  33. 16.77
  34. 0.184
  35. 0.052
  36. 6.46
  37. 105.3
  38. 1.911
  39. 5.28
  40. 0.96

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