Seudónimo Seudónimo
  • 11-01-2015
  • Mathematics
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Why do fractions need to have a common denominator before you add or subtract them?

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Colbertia Colbertia
  • 11-01-2015
fractions need common denominator to add or subtract them because without denominators a fraction is not a fraction, it is a whole number
Example - 2/8 is a fraction
                but 2 is not a fraction
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