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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 781 · 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. 1.5.2 × 23 — where does the decimal point go? (a) 11.96 (b) 1196 (c) 1.196 (d) 119.6
  2. 2.9.1 × 2.1 — where does the decimal point go? (a) 0.1911 (b) 19.11 (c) 1.911 (d) 191.1
  3. 3.1.8 × 2.7 — where does the decimal point go? (a) 48.6 (b) 0.0486 (c) 4.86 (d) 0.486
  4. 4.1.3 × 4.6 — where does the decimal point go? (a) 59.8 (b) 5.98 (c) 0.0598 (d) 0.598
  5. 5.2.6 × 2 — where does the decimal point go? (a) 5.2 (b) 0.52 (c) 52 (d) 0.052
  6. 6.6.7 × 4 — where does the decimal point go? (a) 2.68 (b) 0.268 (c) 26.8 (d) 268
  7. 7.0.13 × 15 — where does the decimal point go? (a) 0.195 (b) 0.0195 (c) 19.5 (d) 1.95
  8. 8.0.24 × 22 — where does the decimal point go? (a) 5.28 (b) 0.0528 (c) 0.528 (d) 52.8
  9. 9.0.72 × 6 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.0432 (d) 0.432
  10. 10.7.1 × 0.4 — where does the decimal point go? (a) 28.4 (b) 2.84 (c) 0.284 (d) 0.0284
  11. 11.0.41 × 0.5 — where does the decimal point go? (a) 0.205 (b) 0.0205 (c) 2.05 (d) 0.00205
  12. 12.0.99 × 8 — where does the decimal point go? (a) 0.0792 (b) 79.2 (c) 7.92 (d) 0.792
  13. 13.8.8 × 9 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 792 (d) 0.792
  14. 14.9.7 × 0.3 — where does the decimal point go? (a) 0.291 (b) 0.0291 (c) 2.91 (d) 29.1
  15. 15.0.38 × 0.7 — where does the decimal point go? (a) 0.266 (b) 0.00266 (c) 0.0266 (d) 2.66
  16. 16.1.4 × 8 — where does the decimal point go? (a) 0.112 (b) 112 (c) 1.12 (d) 11.2
  17. 17.0.48 × 4.1 — where does the decimal point go? (a) 0.01968 (b) 1.968 (c) 0.1968 (d) 19.68
  18. 18.0.81 × 2.6 — where does the decimal point go? (a) 2.106 (b) 0.02106 (c) 0.2106 (d) 21.06
  19. 19.6.2 × 21 — where does the decimal point go? (a) 130.2 (b) 1.302 (c) 13.02 (d) 1302
  20. 20.4.1 × 5 — where does the decimal point go? (a) 2.05 (b) 0.205 (c) 205 (d) 20.5
  21. 21.0.29 × 3.9 — where does the decimal point go? (a) 0.1131 (b) 1.131 (c) 11.31 (d) 0.01131
  22. 22.0.44 × 48 — where does the decimal point go? (a) 0.2112 (b) 211.2 (c) 21.12 (d) 2.112
  23. 23.6.8 × 0.2 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 13.6 (d) 0.136
  24. 24.5.5 × 3.5 — where does the decimal point go? (a) 1.925 (b) 19.25 (c) 192.5 (d) 0.1925
  25. 25.5.7 × 0.5 — where does the decimal point go? (a) 0.285 (b) 0.0285 (c) 28.5 (d) 2.85
  26. 26.0.38 × 3 — where does the decimal point go? (a) 0.114 (b) 1.14 (c) 0.0114 (d) 11.4
  27. 27.7.2 × 0.3 — where does the decimal point go? (a) 21.6 (b) 0.216 (c) 2.16 (d) 0.0216
  28. 28.7.1 × 46 — where does the decimal point go? (a) 326.6 (b) 32.66 (c) 3.266 (d) 3266
  29. 29.3.5 × 2.9 — where does the decimal point go? (a) 1.015 (b) 101.5 (c) 0.1015 (d) 10.15
  30. 30.7.7 × 6 — where does the decimal point go? (a) 46.2 (b) 462 (c) 4.62 (d) 0.462
  31. 31.0.45 × 9 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 40.5 (d) 0.405
  32. 32.1.4 × 0.8 — where does the decimal point go? (a) 0.112 (b) 0.0112 (c) 1.12 (d) 11.2
  33. 33.1.9 × 0.2 — where does the decimal point go? (a) 0.038 (b) 3.8 (c) 0.38 (d) 0.0038
  34. 34.0.75 × 9 — where does the decimal point go? (a) 0.675 (b) 6.75 (c) 0.0675 (d) 67.5
  35. 35.7.9 × 1.1 — where does the decimal point go? (a) 8.69 (b) 0.869 (c) 86.9 (d) 0.0869
  36. 36.1.5 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.45 (c) 0.045 (d) 4.5
  37. 37.0.83 × 2.7 — where does the decimal point go? (a) 2.241 (b) 0.02241 (c) 22.41 (d) 0.2241
  38. 38.1.3 × 31 — where does the decimal point go? (a) 4.03 (b) 40.3 (c) 0.403 (d) 403
  39. 39.2.9 × 3.3 — where does the decimal point go? (a) 0.957 (b) 95.7 (c) 0.0957 (d) 9.57
  40. 40.5.3 × 15 — where does the decimal point go? (a) 7.95 (b) 795 (c) 79.5 (d) 0.795

Answer key

  1. 119.6
  2. 19.11
  3. 4.86
  4. 5.98
  5. 5.2
  6. 26.8
  7. 1.95
  8. 5.28
  9. 4.32
  10. 2.84
  11. 0.205
  12. 7.92
  13. 79.2
  14. 2.91
  15. 0.266
  16. 11.2
  17. 1.968
  18. 2.106
  19. 130.2
  20. 20.5
  21. 1.131
  22. 21.12
  23. 1.36
  24. 19.25
  25. 2.85
  26. 1.14
  27. 2.16
  28. 326.6
  29. 10.15
  30. 46.2
  31. 4.05
  32. 1.12
  33. 0.38
  34. 6.75
  35. 8.69
  36. 0.45
  37. 2.241
  38. 40.3
  39. 9.57
  40. 79.5

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