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it makes it eaiser to add subtract or divide or multiply

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Q: Why does the denominator has to be the same?
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When you add fractions do they have to have the same denominator?

Yes you have to add with the same denominator. when ever you do fractions they have to have the same denominator no matter what. So thats a yes


Definition for like denominator?

Like denominator is the same denominator as the nonzero numbers.


How do you multiply fractions with same denominator?

multiply denominator by denominator and vice versa


How do you subtract mixed fractions when they have the same denominator?

The numerator of the answer is the result of subtracting the numerators of the fractions, and the denominator of the fraction is the same as the common denominator.


How do you divide signed numbers?

Essentially the same way as you would do an ordinary division.If the numerator and denominator have the same sign then the answer is positive.If the numerator and denominator have different signs then the answer is negative.Essentially the same way as you would do an ordinary division.If the numerator and denominator have the same sign then the answer is positive.If the numerator and denominator have different signs then the answer is negative.Essentially the same way as you would do an ordinary division.If the numerator and denominator have the same sign then the answer is positive.If the numerator and denominator have different signs then the answer is negative.Essentially the same way as you would do an ordinary division.If the numerator and denominator have the same sign then the answer is positive.If the numerator and denominator have different signs then the answer is negative.