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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 349 · 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. 1.8.6 × 0.6 — where does the decimal point go? (a) 0.516 (b) 0.0516 (c) 5.16 (d) 51.6
  2. 2.7.3 × 3 — where does the decimal point go? (a) 219 (b) 2.19 (c) 21.9 (d) 0.219
  3. 3.0.26 × 18 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 46.8 (d) 0.0468
  4. 4.9.4 × 0.3 — where does the decimal point go? (a) 0.0282 (b) 28.2 (c) 2.82 (d) 0.282
  5. 5.0.27 × 24 — where does the decimal point go? (a) 6.48 (b) 0.648 (c) 64.8 (d) 0.0648
  6. 6.1.2 × 31 — where does the decimal point go? (a) 0.372 (b) 37.2 (c) 372 (d) 3.72
  7. 7.0.82 × 46 — where does the decimal point go? (a) 377.2 (b) 3.772 (c) 37.72 (d) 0.3772
  8. 8.0.32 × 4.8 — where does the decimal point go? (a) 15.36 (b) 0.1536 (c) 0.01536 (d) 1.536
  9. 9.3.6 × 1.1 — where does the decimal point go? (a) 3.96 (b) 0.396 (c) 0.0396 (d) 39.6
  10. 10.0.63 × 9 — where does the decimal point go? (a) 5.67 (b) 0.567 (c) 0.0567 (d) 56.7
  11. 11.2.7 × 37 — where does the decimal point go? (a) 99.9 (b) 9.99 (c) 999 (d) 0.999
  12. 12.3.6 × 0.3 — where does the decimal point go? (a) 10.8 (b) 1.08 (c) 0.0108 (d) 0.108
  13. 13.5.2 × 21 — where does the decimal point go? (a) 109.2 (b) 1092 (c) 10.92 (d) 1.092
  14. 14.0.17 × 48 — where does the decimal point go? (a) 81.6 (b) 8.16 (c) 0.0816 (d) 0.816
  15. 15.0.25 × 5 — where does the decimal point go? (a) 1.25 (b) 12.5 (c) 0.0125 (d) 0.125
  16. 16.8.5 × 3 — where does the decimal point go? (a) 25.5 (b) 2.55 (c) 0.255 (d) 255
  17. 17.0.86 × 4.6 — where does the decimal point go? (a) 0.3956 (b) 0.03956 (c) 3.956 (d) 39.56
  18. 18.4.4 × 4 — where does the decimal point go? (a) 176 (b) 1.76 (c) 0.176 (d) 17.6
  19. 19.7.2 × 24 — where does the decimal point go? (a) 172.8 (b) 17.28 (c) 1.728 (d) 1728
  20. 20.8.6 × 47 — where does the decimal point go? (a) 40.42 (b) 4042 (c) 404.2 (d) 4.042
  21. 21.0.15 × 0.7 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 0.0105 (d) 0.00105
  22. 22.9.9 × 2 — where does the decimal point go? (a) 19.8 (b) 198 (c) 0.198 (d) 1.98
  23. 23.7.4 × 2.3 — where does the decimal point go? (a) 0.1702 (b) 17.02 (c) 1.702 (d) 170.2
  24. 24.3.5 × 4.7 — where does the decimal point go? (a) 1.645 (b) 164.5 (c) 0.1645 (d) 16.45
  25. 25.8.9 × 4.1 — where does the decimal point go? (a) 0.3649 (b) 3.649 (c) 364.9 (d) 36.49
  26. 26.7.1 × 0.5 — where does the decimal point go? (a) 35.5 (b) 0.355 (c) 3.55 (d) 0.0355
  27. 27.0.73 × 3.6 — where does the decimal point go? (a) 0.2628 (b) 0.02628 (c) 26.28 (d) 2.628
  28. 28.8.2 × 6 — where does the decimal point go? (a) 0.492 (b) 492 (c) 49.2 (d) 4.92
  29. 29.7.5 × 1.5 — where does the decimal point go? (a) 0.1125 (b) 11.25 (c) 112.5 (d) 1.125
  30. 30.1.2 × 4.2 — where does the decimal point go? (a) 0.504 (b) 0.0504 (c) 5.04 (d) 50.4
  31. 31.0.87 × 44 — where does the decimal point go? (a) 3.828 (b) 38.28 (c) 382.8 (d) 0.3828
  32. 32.6.3 × 38 — where does the decimal point go? (a) 239.4 (b) 2394 (c) 23.94 (d) 2.394
  33. 33.8.2 × 4 — where does the decimal point go? (a) 328 (b) 3.28 (c) 0.328 (d) 32.8
  34. 34.5.6 × 26 — where does the decimal point go? (a) 14.56 (b) 1.456 (c) 145.6 (d) 1456
  35. 35.3.9 × 4.6 — where does the decimal point go? (a) 179.4 (b) 17.94 (c) 1.794 (d) 0.1794
  36. 36.1.8 × 1.7 — where does the decimal point go? (a) 30.6 (b) 0.306 (c) 0.0306 (d) 3.06
  37. 37.0.17 × 0.9 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 0.0153 (d) 0.00153
  38. 38.2.7 × 4 — where does the decimal point go? (a) 10.8 (b) 1.08 (c) 108 (d) 0.108
  39. 39.0.36 × 12 — where does the decimal point go? (a) 0.432 (b) 4.32 (c) 43.2 (d) 0.0432
  40. 40.0.42 × 39 — where does the decimal point go? (a) 0.1638 (b) 163.8 (c) 16.38 (d) 1.638

Answer key

  1. 5.16
  2. 21.9
  3. 4.68
  4. 2.82
  5. 6.48
  6. 37.2
  7. 37.72
  8. 1.536
  9. 3.96
  10. 5.67
  11. 99.9
  12. 1.08
  13. 109.2
  14. 8.16
  15. 1.25
  16. 25.5
  17. 3.956
  18. 17.6
  19. 172.8
  20. 404.2
  21. 0.105
  22. 19.8
  23. 17.02
  24. 16.45
  25. 36.49
  26. 3.55
  27. 2.628
  28. 49.2
  29. 11.25
  30. 5.04
  31. 38.28
  32. 239.4
  33. 32.8
  34. 145.6
  35. 17.94
  36. 3.06
  37. 0.153
  38. 10.8
  39. 4.32
  40. 16.38

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