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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 736 · 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. 1.8.4 × 1.1 — where does the decimal point go? (a) 92.4 (b) 0.924 (c) 0.0924 (d) 9.24
  2. 2.2.2 × 9 — where does the decimal point go? (a) 198 (b) 0.198 (c) 19.8 (d) 1.98
  3. 3.7.2 × 0.7 — where does the decimal point go? (a) 0.504 (b) 50.4 (c) 0.0504 (d) 5.04
  4. 4.2.1 × 26 — where does the decimal point go? (a) 54.6 (b) 546 (c) 0.546 (d) 5.46
  5. 5.0.81 × 8 — where does the decimal point go? (a) 0.648 (b) 6.48 (c) 0.0648 (d) 64.8
  6. 6.0.77 × 2.6 — where does the decimal point go? (a) 2.002 (b) 20.02 (c) 0.02002 (d) 0.2002
  7. 7.8.3 × 8 — where does the decimal point go? (a) 664 (b) 0.664 (c) 6.64 (d) 66.4
  8. 8.9.3 × 3.1 — where does the decimal point go? (a) 0.2883 (b) 28.83 (c) 2.883 (d) 288.3
  9. 9.0.14 × 3 — where does the decimal point go? (a) 0.0042 (b) 4.2 (c) 0.42 (d) 0.042
  10. 10.7.7 × 2.6 — where does the decimal point go? (a) 200.2 (b) 0.2002 (c) 20.02 (d) 2.002
  11. 11.6.9 × 2 — where does the decimal point go? (a) 1.38 (b) 13.8 (c) 138 (d) 0.138
  12. 12.2.9 × 0.2 — where does the decimal point go? (a) 0.0058 (b) 5.8 (c) 0.058 (d) 0.58
  13. 13.0.62 × 6 — where does the decimal point go? (a) 37.2 (b) 0.372 (c) 0.0372 (d) 3.72
  14. 14.4.2 × 26 — where does the decimal point go? (a) 1092 (b) 109.2 (c) 10.92 (d) 1.092
  15. 15.8.4 × 7 — where does the decimal point go? (a) 5.88 (b) 0.588 (c) 588 (d) 58.8
  16. 16.5.1 × 3.6 — where does the decimal point go? (a) 1.836 (b) 18.36 (c) 0.1836 (d) 183.6
  17. 17.2.5 × 33 — where does the decimal point go? (a) 825 (b) 0.825 (c) 82.5 (d) 8.25
  18. 18.9.1 × 0.6 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 0.0546 (d) 54.6
  19. 19.9.2 × 27 — where does the decimal point go? (a) 2484 (b) 248.4 (c) 2.484 (d) 24.84
  20. 20.3.3 × 9 — where does the decimal point go? (a) 29.7 (b) 297 (c) 0.297 (d) 2.97
  21. 21.0.43 × 0.3 — where does the decimal point go? (a) 0.0129 (b) 1.29 (c) 0.129 (d) 0.00129
  22. 22.0.18 × 0.9 — where does the decimal point go? (a) 0.162 (b) 1.62 (c) 0.0162 (d) 0.00162
  23. 23.9.7 × 2.1 — where does the decimal point go? (a) 203.7 (b) 2.037 (c) 20.37 (d) 0.2037
  24. 24.6.9 × 8 — where does the decimal point go? (a) 55.2 (b) 5.52 (c) 0.552 (d) 552
  25. 25.5.9 × 0.3 — where does the decimal point go? (a) 17.7 (b) 0.177 (c) 0.0177 (d) 1.77
  26. 26.5.7 × 4 — where does the decimal point go? (a) 0.228 (b) 22.8 (c) 228 (d) 2.28
  27. 27.2.3 × 0.3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.0069 (d) 0.69
  28. 28.1.4 × 2 — where does the decimal point go? (a) 0.28 (b) 0.028 (c) 2.8 (d) 28
  29. 29.1.7 × 6 — where does the decimal point go? (a) 1.02 (b) 102 (c) 0.102 (d) 10.2
  30. 30.0.87 × 4.4 — where does the decimal point go? (a) 0.03828 (b) 0.3828 (c) 3.828 (d) 38.28
  31. 31.7.2 × 0.3 — where does the decimal point go? (a) 0.216 (b) 21.6 (c) 0.0216 (d) 2.16
  32. 32.5.2 × 37 — where does the decimal point go? (a) 1.924 (b) 19.24 (c) 192.4 (d) 1924
  33. 33.0.24 × 0.9 — where does the decimal point go? (a) 0.00216 (b) 0.0216 (c) 2.16 (d) 0.216
  34. 34.0.36 × 0.6 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.00216 (d) 0.0216
  35. 35.9.7 × 36 — where does the decimal point go? (a) 3.492 (b) 3492 (c) 349.2 (d) 34.92
  36. 36.0.16 × 22 — where does the decimal point go? (a) 0.352 (b) 0.0352 (c) 35.2 (d) 3.52
  37. 37.0.44 × 4.3 — where does the decimal point go? (a) 1.892 (b) 18.92 (c) 0.01892 (d) 0.1892
  38. 38.0.36 × 3 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 10.8 (d) 1.08
  39. 39.7.8 × 2 — where does the decimal point go? (a) 156 (b) 0.156 (c) 1.56 (d) 15.6
  40. 40.0.71 × 41 — where does the decimal point go? (a) 29.11 (b) 2.911 (c) 291.1 (d) 0.2911

Answer key

  1. 9.24
  2. 19.8
  3. 5.04
  4. 54.6
  5. 6.48
  6. 2.002
  7. 66.4
  8. 28.83
  9. 0.42
  10. 20.02
  11. 13.8
  12. 0.58
  13. 3.72
  14. 109.2
  15. 58.8
  16. 18.36
  17. 82.5
  18. 5.46
  19. 248.4
  20. 29.7
  21. 0.129
  22. 0.162
  23. 20.37
  24. 55.2
  25. 1.77
  26. 22.8
  27. 0.69
  28. 2.8
  29. 10.2
  30. 3.828
  31. 2.16
  32. 192.4
  33. 0.216
  34. 0.216
  35. 349.2
  36. 3.52
  37. 1.892
  38. 1.08
  39. 15.6
  40. 29.11

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