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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 711 · 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. 1.0.29 × 47 — where does the decimal point go? (a) 0.1363 (b) 136.3 (c) 1.363 (d) 13.63
  2. 2.0.98 × 19 — where does the decimal point go? (a) 1.862 (b) 0.1862 (c) 18.62 (d) 186.2
  3. 3.0.83 × 4.8 — where does the decimal point go? (a) 3.984 (b) 0.03984 (c) 39.84 (d) 0.3984
  4. 4.7.5 × 5 — where does the decimal point go? (a) 3.75 (b) 0.375 (c) 37.5 (d) 375
  5. 5.7.8 × 8 — where does the decimal point go? (a) 6.24 (b) 0.624 (c) 62.4 (d) 624
  6. 6.0.38 × 1.4 — where does the decimal point go? (a) 0.0532 (b) 0.532 (c) 0.00532 (d) 5.32
  7. 7.3.6 × 1.6 — where does the decimal point go? (a) 5.76 (b) 57.6 (c) 0.576 (d) 0.0576
  8. 8.0.26 × 8 — where does the decimal point go? (a) 0.208 (b) 0.0208 (c) 20.8 (d) 2.08
  9. 9.5.7 × 8 — where does the decimal point go? (a) 45.6 (b) 4.56 (c) 456 (d) 0.456
  10. 10.2.2 × 4 — where does the decimal point go? (a) 0.088 (b) 8.8 (c) 0.88 (d) 88
  11. 11.2.1 × 31 — where does the decimal point go? (a) 651 (b) 65.1 (c) 0.651 (d) 6.51
  12. 12.0.36 × 13 — where does the decimal point go? (a) 46.8 (b) 0.0468 (c) 4.68 (d) 0.468
  13. 13.9.9 × 42 — where does the decimal point go? (a) 4.158 (b) 4158 (c) 415.8 (d) 41.58
  14. 14.9.7 × 0.6 — where does the decimal point go? (a) 0.582 (b) 5.82 (c) 58.2 (d) 0.0582
  15. 15.1.2 × 0.4 — where does the decimal point go? (a) 4.8 (b) 0.48 (c) 0.048 (d) 0.0048
  16. 16.0.74 × 39 — where does the decimal point go? (a) 0.2886 (b) 28.86 (c) 2.886 (d) 288.6
  17. 17.6.9 × 7 — where does the decimal point go? (a) 0.483 (b) 48.3 (c) 483 (d) 4.83
  18. 18.0.92 × 0.9 — where does the decimal point go? (a) 0.828 (b) 0.00828 (c) 0.0828 (d) 8.28
  19. 19.7.3 × 0.4 — where does the decimal point go? (a) 0.292 (b) 29.2 (c) 2.92 (d) 0.0292
  20. 20.6.2 × 3 — where does the decimal point go? (a) 0.186 (b) 186 (c) 1.86 (d) 18.6
  21. 21.0.98 × 7 — where does the decimal point go? (a) 0.0686 (b) 68.6 (c) 0.686 (d) 6.86
  22. 22.0.36 × 0.3 — where does the decimal point go? (a) 1.08 (b) 0.00108 (c) 0.0108 (d) 0.108
  23. 23.5.6 × 2.7 — where does the decimal point go? (a) 0.1512 (b) 1.512 (c) 151.2 (d) 15.12
  24. 24.0.29 × 2.2 — where does the decimal point go? (a) 0.638 (b) 0.0638 (c) 0.00638 (d) 6.38
  25. 25.5.3 × 0.3 — where does the decimal point go? (a) 0.159 (b) 1.59 (c) 15.9 (d) 0.0159
  26. 26.0.72 × 4.3 — where does the decimal point go? (a) 3.096 (b) 30.96 (c) 0.03096 (d) 0.3096
  27. 27.2.5 × 37 — where does the decimal point go? (a) 9.25 (b) 92.5 (c) 0.925 (d) 925
  28. 28.2.9 × 4 — where does the decimal point go? (a) 1.16 (b) 0.116 (c) 116 (d) 11.6
  29. 29.7.3 × 5 — where does the decimal point go? (a) 0.365 (b) 36.5 (c) 3.65 (d) 365
  30. 30.0.69 × 0.7 — where does the decimal point go? (a) 4.83 (b) 0.483 (c) 0.0483 (d) 0.00483
  31. 31.0.15 × 9 — where does the decimal point go? (a) 0.0135 (b) 1.35 (c) 13.5 (d) 0.135
  32. 32.9.3 × 12 — where does the decimal point go? (a) 1.116 (b) 111.6 (c) 11.16 (d) 1116
  33. 33.0.67 × 0.7 — where does the decimal point go? (a) 0.00469 (b) 0.0469 (c) 0.469 (d) 4.69
  34. 34.0.62 × 1.7 — where does the decimal point go? (a) 1.054 (b) 10.54 (c) 0.1054 (d) 0.01054
  35. 35.0.97 × 0.6 — where does the decimal point go? (a) 5.82 (b) 0.582 (c) 0.00582 (d) 0.0582
  36. 36.4.1 × 2.1 — where does the decimal point go? (a) 86.1 (b) 0.0861 (c) 0.861 (d) 8.61
  37. 37.0.63 × 2.3 — where does the decimal point go? (a) 14.49 (b) 0.1449 (c) 1.449 (d) 0.01449
  38. 38.5.3 × 0.6 — where does the decimal point go? (a) 0.318 (b) 31.8 (c) 3.18 (d) 0.0318
  39. 39.3.8 × 27 — where does the decimal point go? (a) 1.026 (b) 1026 (c) 102.6 (d) 10.26
  40. 40.6.2 × 0.6 — where does the decimal point go? (a) 0.372 (b) 3.72 (c) 0.0372 (d) 37.2

Answer key

  1. 13.63
  2. 18.62
  3. 3.984
  4. 37.5
  5. 62.4
  6. 0.532
  7. 5.76
  8. 2.08
  9. 45.6
  10. 8.8
  11. 65.1
  12. 4.68
  13. 415.8
  14. 5.82
  15. 0.48
  16. 28.86
  17. 48.3
  18. 0.828
  19. 2.92
  20. 18.6
  21. 6.86
  22. 0.108
  23. 15.12
  24. 0.638
  25. 1.59
  26. 3.096
  27. 92.5
  28. 11.6
  29. 36.5
  30. 0.483
  31. 1.35
  32. 111.6
  33. 0.469
  34. 1.054
  35. 0.582
  36. 8.61
  37. 1.449
  38. 3.18
  39. 102.6
  40. 3.72

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