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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 975 · 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. 1.0.33 × 0.3 — where does the decimal point go? (a) 0.099 (b) 0.0099 (c) 0.00099 (d) 0.99
  2. 2.2.5 × 21 — where does the decimal point go? (a) 0.525 (b) 5.25 (c) 525 (d) 52.5
  3. 3.0.23 × 2.8 — where does the decimal point go? (a) 0.644 (b) 0.0644 (c) 0.00644 (d) 6.44
  4. 4.1.6 × 0.2 — where does the decimal point go? (a) 0.0032 (b) 0.032 (c) 0.32 (d) 3.2
  5. 5.0.23 × 7 — where does the decimal point go? (a) 0.0161 (b) 1.61 (c) 0.161 (d) 16.1
  6. 6.6.1 × 3 — where does the decimal point go? (a) 1.83 (b) 183 (c) 18.3 (d) 0.183
  7. 7.0.47 × 9 — where does the decimal point go? (a) 4.23 (b) 0.0423 (c) 0.423 (d) 42.3
  8. 8.0.38 × 1.1 — where does the decimal point go? (a) 0.0418 (b) 0.00418 (c) 0.418 (d) 4.18
  9. 9.1.9 × 0.3 — where does the decimal point go? (a) 0.57 (b) 0.057 (c) 5.7 (d) 0.0057
  10. 10.8.3 × 32 — where does the decimal point go? (a) 2.656 (b) 26.56 (c) 265.6 (d) 2656
  11. 11.6.4 × 9 — where does the decimal point go? (a) 576 (b) 0.576 (c) 57.6 (d) 5.76
  12. 12.0.47 × 16 — where does the decimal point go? (a) 75.2 (b) 0.752 (c) 0.0752 (d) 7.52
  13. 13.3.8 × 0.6 — where does the decimal point go? (a) 0.0228 (b) 22.8 (c) 2.28 (d) 0.228
  14. 14.4.5 × 25 — where does the decimal point go? (a) 1125 (b) 112.5 (c) 11.25 (d) 1.125
  15. 15.0.95 × 13 — where does the decimal point go? (a) 12.35 (b) 1.235 (c) 123.5 (d) 0.1235
  16. 16.7.2 × 38 — where does the decimal point go? (a) 2.736 (b) 273.6 (c) 27.36 (d) 2736
  17. 17.7.6 × 36 — where does the decimal point go? (a) 2736 (b) 27.36 (c) 2.736 (d) 273.6
  18. 18.1.7 × 8 — where does the decimal point go? (a) 13.6 (b) 0.136 (c) 1.36 (d) 136
  19. 19.9.7 × 0.8 — where does the decimal point go? (a) 7.76 (b) 0.776 (c) 0.0776 (d) 77.6
  20. 20.0.26 × 6 — where does the decimal point go? (a) 0.0156 (b) 1.56 (c) 15.6 (d) 0.156
  21. 21.0.41 × 0.5 — where does the decimal point go? (a) 2.05 (b) 0.00205 (c) 0.0205 (d) 0.205
  22. 22.0.62 × 34 — where does the decimal point go? (a) 210.8 (b) 2.108 (c) 21.08 (d) 0.2108
  23. 23.0.27 × 29 — where does the decimal point go? (a) 0.783 (b) 78.3 (c) 0.0783 (d) 7.83
  24. 24.2.7 × 0.4 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
  25. 25.3.7 × 0.9 — where does the decimal point go? (a) 0.0333 (b) 33.3 (c) 0.333 (d) 3.33
  26. 26.8.4 × 0.7 — where does the decimal point go? (a) 0.588 (b) 58.8 (c) 5.88 (d) 0.0588
  27. 27.6.9 × 14 — where does the decimal point go? (a) 966 (b) 0.966 (c) 9.66 (d) 96.6
  28. 28.1.7 × 1.8 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 30.6 (d) 0.0306
  29. 29.5.5 × 0.7 — where does the decimal point go? (a) 3.85 (b) 38.5 (c) 0.385 (d) 0.0385
  30. 30.9.4 × 0.4 — where does the decimal point go? (a) 37.6 (b) 0.376 (c) 3.76 (d) 0.0376
  31. 31.2.8 × 1.1 — where does the decimal point go? (a) 0.0308 (b) 0.308 (c) 3.08 (d) 30.8
  32. 32.8.1 × 0.6 — where does the decimal point go? (a) 0.0486 (b) 4.86 (c) 0.486 (d) 48.6
  33. 33.6.4 × 0.2 — where does the decimal point go? (a) 0.0128 (b) 12.8 (c) 0.128 (d) 1.28
  34. 34.2.3 × 4 — where does the decimal point go? (a) 9.2 (b) 0.92 (c) 0.092 (d) 92
  35. 35.5.3 × 9 — where does the decimal point go? (a) 0.477 (b) 47.7 (c) 4.77 (d) 477
  36. 36.7.7 × 3 — where does the decimal point go? (a) 0.231 (b) 2.31 (c) 231 (d) 23.1
  37. 37.0.16 × 3 — where does the decimal point go? (a) 0.0048 (b) 0.48 (c) 4.8 (d) 0.048
  38. 38.0.79 × 0.3 — where does the decimal point go? (a) 0.237 (b) 0.0237 (c) 2.37 (d) 0.00237
  39. 39.0.68 × 39 — where does the decimal point go? (a) 265.2 (b) 2.652 (c) 26.52 (d) 0.2652
  40. 40.7.5 × 5 — where does the decimal point go? (a) 375 (b) 37.5 (c) 3.75 (d) 0.375

Answer key

  1. 0.099
  2. 52.5
  3. 0.644
  4. 0.32
  5. 1.61
  6. 18.3
  7. 4.23
  8. 0.418
  9. 0.57
  10. 265.6
  11. 57.6
  12. 7.52
  13. 2.28
  14. 112.5
  15. 12.35
  16. 273.6
  17. 273.6
  18. 13.6
  19. 7.76
  20. 1.56
  21. 0.205
  22. 21.08
  23. 7.83
  24. 1.08
  25. 3.33
  26. 5.88
  27. 96.6
  28. 3.06
  29. 3.85
  30. 3.76
  31. 3.08
  32. 4.86
  33. 1.28
  34. 9.2
  35. 47.7
  36. 23.1
  37. 0.48
  38. 0.237
  39. 26.52
  40. 37.5

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