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Q: If the denominators are different do you add them?

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with different denominators, just get their lcd and that will serve as they're denominator.

the new denominator

Only if the denominators are different.

Yes, 'fractions' with different numerators can be added, but not with different denominators. In the case where you have different denominators, you must find the LCM (lowest common multiple).

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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 cannot add or subtract fractions with different denominators. If the denominators are different then you need to work with equivalent fractions.

Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.

YOU JUST CANT....go on you try it

You have to make the fractions equivalent, which means you need to find the lowest common factor that goes into both the denominators.

No.

The denominators are different, so find the equivalent fractions using the LCD , then add the fractions with the denominators.

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