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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 995 · 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. 1.9.1 × 22 — where does the decimal point go? (a) 200.2 (b) 2.002 (c) 2002 (d) 20.02
  2. 2.6.9 × 0.7 — where does the decimal point go? (a) 0.483 (b) 48.3 (c) 4.83 (d) 0.0483
  3. 3.2.2 × 1.8 — where does the decimal point go? (a) 39.6 (b) 3.96 (c) 0.0396 (d) 0.396
  4. 4.0.54 × 6 — where does the decimal point go? (a) 32.4 (b) 0.0324 (c) 0.324 (d) 3.24
  5. 5.0.47 × 6 — where does the decimal point go? (a) 0.0282 (b) 2.82 (c) 0.282 (d) 28.2
  6. 6.0.84 × 3.4 — where does the decimal point go? (a) 0.02856 (b) 0.2856 (c) 2.856 (d) 28.56
  7. 7.0.57 × 0.6 — where does the decimal point go? (a) 0.342 (b) 3.42 (c) 0.00342 (d) 0.0342
  8. 8.0.71 × 14 — where does the decimal point go? (a) 0.994 (b) 9.94 (c) 99.4 (d) 0.0994
  9. 9.0.58 × 3 — where does the decimal point go? (a) 0.0174 (b) 17.4 (c) 0.174 (d) 1.74
  10. 10.2.8 × 23 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 644 (d) 64.4
  11. 11.0.26 × 9 — where does the decimal point go? (a) 2.34 (b) 0.0234 (c) 23.4 (d) 0.234
  12. 12.0.36 × 29 — where does the decimal point go? (a) 0.1044 (b) 10.44 (c) 104.4 (d) 1.044
  13. 13.0.52 × 0.7 — where does the decimal point go? (a) 0.0364 (b) 0.00364 (c) 3.64 (d) 0.364
  14. 14.0.92 × 3 — where does the decimal point go? (a) 0.0276 (b) 2.76 (c) 0.276 (d) 27.6
  15. 15.1.3 × 7 — where does the decimal point go? (a) 0.91 (b) 9.1 (c) 91 (d) 0.091
  16. 16.3.4 × 3.8 — where does the decimal point go? (a) 1.292 (b) 129.2 (c) 0.1292 (d) 12.92
  17. 17.6.4 × 3 — where does the decimal point go? (a) 0.192 (b) 192 (c) 1.92 (d) 19.2
  18. 18.0.39 × 1.5 — where does the decimal point go? (a) 0.0585 (b) 0.00585 (c) 0.585 (d) 5.85
  19. 19.6.1 × 4.9 — where does the decimal point go? (a) 298.9 (b) 0.2989 (c) 2.989 (d) 29.89
  20. 20.3.9 × 14 — where does the decimal point go? (a) 5.46 (b) 0.546 (c) 546 (d) 54.6
  21. 21.1.6 × 16 — where does the decimal point go? (a) 0.256 (b) 256 (c) 2.56 (d) 25.6
  22. 22.7.3 × 46 — where does the decimal point go? (a) 335.8 (b) 33.58 (c) 3358 (d) 3.358
  23. 23.0.45 × 0.3 — where does the decimal point go? (a) 0.135 (b) 1.35 (c) 0.0135 (d) 0.00135
  24. 24.9.4 × 0.8 — where does the decimal point go? (a) 0.752 (b) 7.52 (c) 0.0752 (d) 75.2
  25. 25.8.9 × 3 — where does the decimal point go? (a) 26.7 (b) 2.67 (c) 267 (d) 0.267
  26. 26.3.9 × 0.6 — where does the decimal point go? (a) 2.34 (b) 0.234 (c) 0.0234 (d) 23.4
  27. 27.0.43 × 2 — where does the decimal point go? (a) 8.6 (b) 0.0086 (c) 0.086 (d) 0.86
  28. 28.0.97 × 0.9 — where does the decimal point go? (a) 0.00873 (b) 0.0873 (c) 8.73 (d) 0.873
  29. 29.2.7 × 44 — where does the decimal point go? (a) 1.188 (b) 11.88 (c) 1188 (d) 118.8
  30. 30.0.91 × 0.3 — where does the decimal point go? (a) 2.73 (b) 0.0273 (c) 0.273 (d) 0.00273
  31. 31.4.7 × 2.2 — where does the decimal point go? (a) 10.34 (b) 1.034 (c) 0.1034 (d) 103.4
  32. 32.0.46 × 3.2 — where does the decimal point go? (a) 14.72 (b) 0.1472 (c) 1.472 (d) 0.01472
  33. 33.7.6 × 31 — where does the decimal point go? (a) 23.56 (b) 2.356 (c) 2356 (d) 235.6
  34. 34.7.9 × 9 — where does the decimal point go? (a) 0.711 (b) 7.11 (c) 71.1 (d) 711
  35. 35.4.4 × 0.4 — where does the decimal point go? (a) 17.6 (b) 1.76 (c) 0.0176 (d) 0.176
  36. 36.6.6 × 1.8 — where does the decimal point go? (a) 11.88 (b) 118.8 (c) 1.188 (d) 0.1188
  37. 37.0.53 × 28 — where does the decimal point go? (a) 14.84 (b) 1.484 (c) 148.4 (d) 0.1484
  38. 38.0.37 × 0.7 — where does the decimal point go? (a) 0.00259 (b) 0.0259 (c) 2.59 (d) 0.259
  39. 39.3.4 × 0.7 — where does the decimal point go? (a) 0.0238 (b) 23.8 (c) 2.38 (d) 0.238
  40. 40.0.16 × 2 — where does the decimal point go? (a) 0.32 (b) 3.2 (c) 0.0032 (d) 0.032

Answer key

  1. 200.2
  2. 4.83
  3. 3.96
  4. 3.24
  5. 2.82
  6. 2.856
  7. 0.342
  8. 9.94
  9. 1.74
  10. 64.4
  11. 2.34
  12. 10.44
  13. 0.364
  14. 2.76
  15. 9.1
  16. 12.92
  17. 19.2
  18. 0.585
  19. 29.89
  20. 54.6
  21. 25.6
  22. 335.8
  23. 0.135
  24. 7.52
  25. 26.7
  26. 2.34
  27. 0.86
  28. 0.873
  29. 118.8
  30. 0.273
  31. 10.34
  32. 1.472
  33. 235.6
  34. 71.1
  35. 1.76
  36. 11.88
  37. 14.84
  38. 0.259
  39. 2.38
  40. 0.32

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