Show Download Article Fractions are composed of a numerator and denominator, and when two fractions have the same number for a denominator, it is known as a common, or like, denominator. Adding fractions together when they have a common denominator is easy to do, because you can just add all the numerators together! The new fraction will use the same original denominator, so all you have to worry about is adding the numbers above the line. The same is true for subtracting fractions that have common denominators. Things get a little trickier when the fractions don’t have the same denominator, but they can still be added or subtracted by finding a common denominator first.
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Thanks for submitting a tip for review! About This ArticleThanks to all authors for creating a page that has been read 59,757 times. Did this article help you?Can you add fractions if they have the same denominator?Fractions with the same denominators are called like fractions . To add fractions with like denominators, add the numerators , and write the sum over the denominator.
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