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it makes it eaiser to add subtract or divide or multiply

Q: Why does the denominator has to be the same?

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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

Like denominator is the same denominator as the nonzero numbers.

multiply denominator by denominator and vice versa

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.

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.

Related questions

The same numerator as which numerator and the same denominator as which denominator?

Like Fractions

The answer depends on what the denominator has to be the same as!

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

Similiar fractions are fractions that have the same denominator.

Yes you make same denominator

Like denominator is the same denominator as the nonzero numbers.

multiply denominator by denominator and vice versa

you find the common denominator

Yes because the numerator will not be right if the denominator doesn't have the same as the other denominator which will mess up the answer

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.

when you divide the numerator and denominator by the same factor