Q: How do you add and subtract fractions with the same denominator?

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You need a common denominator in order to add or subtract fractions.

The denominators must be the same before you can add or subtract fractions.

It stays the same. Only the numerators change.

Common Denominator means that the denominators in two (or more) fractions are common, or the same. The common denominator is important because before you can add or subtract fractions, the fractions need to have a common denominator.Sometimes fractions have different denominators, like 2/3 and 3/4. If you want to add or subtract them, they need to have the same denominator. In order to do that, you find a common denominator which is the same thing as a common multiple, only with denominators.

If you are adding or subtracting fractions with the same denominator, you can add or subtract the numerators and keep the denominator the same. 1/8 + 3/8+ 3/8 = 7/8, for example

Related questions

no, to add and subtract like and unlike fractions the denominator has to be the same,

In order to add or subtract fractions, they must have the same denominator.

The same as with positive ones. Make sure they have the same denominator and add or subtract their numerators.

he fact that they are improper is irrelevant. Re-scale the fractions so that they have the same denominator and thenadd or subtract as required.

You need a common denominator in order to add or subtract fractions.

You can add or subtract fractions only if they are "like" fractions, that is, only if they have the same denominator - unless you know your fractions really well.

If the fractions have the same denominator, add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible. If the fractions have different denominators, find the LCM of the denominators and convert the fractions to equivalent fractions with like denominators. Then add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible.

You first convert them to similar fractions, i.e., to fractions that have the same denominator.* Step one: find a common denominator.* Step two: convert both fractions to equivalent fractions that have that denominator.

The denominators must be the same before you can add or subtract fractions.

We can only add or subtract fractions if they have the same denominators

It stays the same. Only the numerators change.

Common Denominator means that the denominators in two (or more) fractions are common, or the same. The common denominator is important because before you can add or subtract fractions, the fractions need to have a common denominator.Sometimes fractions have different denominators, like 2/3 and 3/4. If you want to add or subtract them, they need to have the same denominator. In order to do that, you find a common denominator which is the same thing as a common multiple, only with denominators.