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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 543 · 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. 1.8.8 × 4.3 — where does the decimal point go? (a) 37.84 (b) 0.3784 (c) 378.4 (d) 3.784
  2. 2.0.84 × 0.7 — where does the decimal point go? (a) 0.0588 (b) 0.00588 (c) 0.588 (d) 5.88
  3. 3.0.28 × 22 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 61.6 (d) 6.16
  4. 4.0.98 × 26 — where does the decimal point go? (a) 25.48 (b) 254.8 (c) 2.548 (d) 0.2548
  5. 5.0.39 × 32 — where does the decimal point go? (a) 124.8 (b) 12.48 (c) 1.248 (d) 0.1248
  6. 6.0.83 × 12 — where does the decimal point go? (a) 0.0996 (b) 99.6 (c) 0.996 (d) 9.96
  7. 7.3.7 × 6 — where does the decimal point go? (a) 2.22 (b) 22.2 (c) 0.222 (d) 222
  8. 8.2.9 × 35 — where does the decimal point go? (a) 1.015 (b) 1015 (c) 10.15 (d) 101.5
  9. 9.3.7 × 41 — where does the decimal point go? (a) 151.7 (b) 15.17 (c) 1517 (d) 1.517
  10. 10.0.31 × 3 — where does the decimal point go? (a) 9.3 (b) 0.93 (c) 0.0093 (d) 0.093
  11. 11.0.17 × 8 — where does the decimal point go? (a) 0.136 (b) 0.0136 (c) 1.36 (d) 13.6
  12. 12.2.7 × 29 — where does the decimal point go? (a) 78.3 (b) 0.783 (c) 7.83 (d) 783
  13. 13.0.36 × 2.2 — where does the decimal point go? (a) 0.792 (b) 0.00792 (c) 7.92 (d) 0.0792
  14. 14.5.1 × 3 — where does the decimal point go? (a) 1.53 (b) 15.3 (c) 0.153 (d) 153
  15. 15.6.8 × 7 — where does the decimal point go? (a) 0.476 (b) 476 (c) 47.6 (d) 4.76
  16. 16.0.27 × 32 — where does the decimal point go? (a) 0.864 (b) 0.0864 (c) 86.4 (d) 8.64
  17. 17.0.95 × 3 — where does the decimal point go? (a) 28.5 (b) 2.85 (c) 0.0285 (d) 0.285
  18. 18.8.3 × 23 — where does the decimal point go? (a) 1.909 (b) 1909 (c) 19.09 (d) 190.9
  19. 19.0.13 × 0.2 — where does the decimal point go? (a) 0.00026 (b) 0.026 (c) 0.0026 (d) 0.26
  20. 20.3.1 × 36 — where does the decimal point go? (a) 1.116 (b) 11.16 (c) 1116 (d) 111.6
  21. 21.0.94 × 0.3 — where does the decimal point go? (a) 0.282 (b) 0.00282 (c) 2.82 (d) 0.0282
  22. 22.0.15 × 1.3 — where does the decimal point go? (a) 0.195 (b) 1.95 (c) 0.00195 (d) 0.0195
  23. 23.2.3 × 4.7 — where does the decimal point go? (a) 108.1 (b) 1.081 (c) 0.1081 (d) 10.81
  24. 24.4.7 × 26 — where does the decimal point go? (a) 12.22 (b) 122.2 (c) 1222 (d) 1.222
  25. 25.4.6 × 0.7 — where does the decimal point go? (a) 32.2 (b) 0.322 (c) 0.0322 (d) 3.22
  26. 26.0.39 × 0.4 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 0.00156 (d) 0.0156
  27. 27.0.74 × 0.4 — where does the decimal point go? (a) 0.0296 (b) 2.96 (c) 0.296 (d) 0.00296
  28. 28.5.6 × 0.8 — where does the decimal point go? (a) 0.448 (b) 44.8 (c) 0.0448 (d) 4.48
  29. 29.0.57 × 3.1 — where does the decimal point go? (a) 0.1767 (b) 1.767 (c) 0.01767 (d) 17.67
  30. 30.0.86 × 22 — where does the decimal point go? (a) 1.892 (b) 0.1892 (c) 18.92 (d) 189.2
  31. 31.0.75 × 4.9 — where does the decimal point go? (a) 36.75 (b) 0.03675 (c) 3.675 (d) 0.3675
  32. 32.3.7 × 2.1 — where does the decimal point go? (a) 0.777 (b) 7.77 (c) 0.0777 (d) 77.7
  33. 33.0.82 × 44 — where does the decimal point go? (a) 0.3608 (b) 360.8 (c) 36.08 (d) 3.608
  34. 34.0.18 × 1.4 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 2.52 (d) 0.00252
  35. 35.0.27 × 8 — where does the decimal point go? (a) 0.0216 (b) 0.216 (c) 2.16 (d) 21.6
  36. 36.1.3 × 49 — where does the decimal point go? (a) 637 (b) 63.7 (c) 0.637 (d) 6.37
  37. 37.3.2 × 21 — where does the decimal point go? (a) 67.2 (b) 0.672 (c) 672 (d) 6.72
  38. 38.3.9 × 0.5 — where does the decimal point go? (a) 1.95 (b) 0.195 (c) 0.0195 (d) 19.5
  39. 39.9.8 × 4 — where does the decimal point go? (a) 0.392 (b) 392 (c) 3.92 (d) 39.2
  40. 40.0.62 × 4.8 — where does the decimal point go? (a) 2.976 (b) 0.02976 (c) 0.2976 (d) 29.76

Answer key

  1. 37.84
  2. 0.588
  3. 6.16
  4. 25.48
  5. 12.48
  6. 9.96
  7. 22.2
  8. 101.5
  9. 151.7
  10. 0.93
  11. 1.36
  12. 78.3
  13. 0.792
  14. 15.3
  15. 47.6
  16. 8.64
  17. 2.85
  18. 190.9
  19. 0.026
  20. 111.6
  21. 0.282
  22. 0.195
  23. 10.81
  24. 122.2
  25. 3.22
  26. 0.156
  27. 0.296
  28. 4.48
  29. 1.767
  30. 18.92
  31. 3.675
  32. 7.77
  33. 36.08
  34. 0.252
  35. 2.16
  36. 63.7
  37. 67.2
  38. 1.95
  39. 39.2
  40. 2.976

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