Why do fractions need to have a common denominator before you add or subtract them?

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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 · Answer 1 · 2015-01-11T23:46:18+01:00

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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