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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 172 · 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. 1.8.5 × 7 — where does the decimal point go? (a) 0.595 (b) 59.5 (c) 595 (d) 5.95
  2. 2.4.8 × 4 — where does the decimal point go? (a) 1.92 (b) 0.192 (c) 192 (d) 19.2
  3. 3.3.7 × 0.7 — where does the decimal point go? (a) 0.0259 (b) 2.59 (c) 25.9 (d) 0.259
  4. 4.6.1 × 3 — where does the decimal point go? (a) 183 (b) 1.83 (c) 0.183 (d) 18.3
  5. 5.0.79 × 19 — where does the decimal point go? (a) 15.01 (b) 0.1501 (c) 150.1 (d) 1.501
  6. 6.0.54 × 46 — where does the decimal point go? (a) 24.84 (b) 248.4 (c) 2.484 (d) 0.2484
  7. 7.0.46 × 0.7 — where does the decimal point go? (a) 0.0322 (b) 0.322 (c) 3.22 (d) 0.00322
  8. 8.0.49 × 3 — where does the decimal point go? (a) 1.47 (b) 14.7 (c) 0.147 (d) 0.0147
  9. 9.3.1 × 0.3 — where does the decimal point go? (a) 0.0093 (b) 0.093 (c) 9.3 (d) 0.93
  10. 10.3.3 × 0.4 — where does the decimal point go? (a) 1.32 (b) 0.0132 (c) 13.2 (d) 0.132
  11. 11.0.98 × 0.3 — where does the decimal point go? (a) 2.94 (b) 0.00294 (c) 0.0294 (d) 0.294
  12. 12.9.7 × 0.4 — where does the decimal point go? (a) 3.88 (b) 38.8 (c) 0.388 (d) 0.0388
  13. 13.0.99 × 27 — where does the decimal point go? (a) 26.73 (b) 0.2673 (c) 267.3 (d) 2.673
  14. 14.5.4 × 29 — where does the decimal point go? (a) 156.6 (b) 15.66 (c) 1566 (d) 1.566
  15. 15.5.3 × 47 — where does the decimal point go? (a) 2.491 (b) 2491 (c) 24.91 (d) 249.1
  16. 16.0.58 × 8 — where does the decimal point go? (a) 4.64 (b) 0.464 (c) 0.0464 (d) 46.4
  17. 17.4.7 × 2 — where does the decimal point go? (a) 0.094 (b) 0.94 (c) 9.4 (d) 94
  18. 18.8.8 × 0.8 — where does the decimal point go? (a) 7.04 (b) 0.704 (c) 70.4 (d) 0.0704
  19. 19.7.6 × 3.3 — where does the decimal point go? (a) 2.508 (b) 0.2508 (c) 250.8 (d) 25.08
  20. 20.2.3 × 0.9 — where does the decimal point go? (a) 0.0207 (b) 2.07 (c) 20.7 (d) 0.207
  21. 21.0.78 × 28 — where does the decimal point go? (a) 2.184 (b) 218.4 (c) 0.2184 (d) 21.84
  22. 22.6.6 × 0.7 — where does the decimal point go? (a) 4.62 (b) 46.2 (c) 0.462 (d) 0.0462
  23. 23.0.63 × 13 — where does the decimal point go? (a) 0.819 (b) 81.9 (c) 8.19 (d) 0.0819
  24. 24.1.7 × 0.6 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 0.0102 (d) 0.102
  25. 25.5.1 × 2.7 — where does the decimal point go? (a) 13.77 (b) 0.1377 (c) 137.7 (d) 1.377
  26. 26.0.67 × 9 — where does the decimal point go? (a) 0.0603 (b) 0.603 (c) 60.3 (d) 6.03
  27. 27.0.82 × 23 — where does the decimal point go? (a) 18.86 (b) 0.1886 (c) 1.886 (d) 188.6
  28. 28.9.7 × 0.7 — where does the decimal point go? (a) 0.0679 (b) 0.679 (c) 67.9 (d) 6.79
  29. 29.4.7 × 1.3 — where does the decimal point go? (a) 61.1 (b) 0.0611 (c) 0.611 (d) 6.11
  30. 30.0.22 × 26 — where does the decimal point go? (a) 57.2 (b) 5.72 (c) 0.572 (d) 0.0572
  31. 31.5.3 × 4.2 — where does the decimal point go? (a) 22.26 (b) 222.6 (c) 2.226 (d) 0.2226
  32. 32.0.87 × 0.3 — where does the decimal point go? (a) 2.61 (b) 0.00261 (c) 0.0261 (d) 0.261
  33. 33.5.7 × 17 — where does the decimal point go? (a) 0.969 (b) 969 (c) 96.9 (d) 9.69
  34. 34.0.73 × 5 — where does the decimal point go? (a) 3.65 (b) 0.365 (c) 36.5 (d) 0.0365
  35. 35.0.61 × 1.5 — where does the decimal point go? (a) 0.0915 (b) 9.15 (c) 0.915 (d) 0.00915
  36. 36.2.8 × 3.2 — where does the decimal point go? (a) 8.96 (b) 0.0896 (c) 89.6 (d) 0.896
  37. 37.5.4 × 4 — where does the decimal point go? (a) 216 (b) 0.216 (c) 21.6 (d) 2.16
  38. 38.5.7 × 13 — where does the decimal point go? (a) 741 (b) 0.741 (c) 74.1 (d) 7.41
  39. 39.3.6 × 2 — where does the decimal point go? (a) 0.72 (b) 0.072 (c) 7.2 (d) 72
  40. 40.0.68 × 34 — where does the decimal point go? (a) 0.2312 (b) 231.2 (c) 23.12 (d) 2.312

Answer key

  1. 59.5
  2. 19.2
  3. 2.59
  4. 18.3
  5. 15.01
  6. 24.84
  7. 0.322
  8. 1.47
  9. 0.93
  10. 1.32
  11. 0.294
  12. 3.88
  13. 26.73
  14. 156.6
  15. 249.1
  16. 4.64
  17. 9.4
  18. 7.04
  19. 25.08
  20. 2.07
  21. 21.84
  22. 4.62
  23. 8.19
  24. 1.02
  25. 13.77
  26. 6.03
  27. 18.86
  28. 6.79
  29. 6.11
  30. 5.72
  31. 22.26
  32. 0.261
  33. 96.9
  34. 3.65
  35. 0.915
  36. 8.96
  37. 21.6
  38. 74.1
  39. 7.2
  40. 23.12

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