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Q: Do you need a common denominator when subtracting fractions?

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You DO need a common denominator to add, subtract, or compare fractions. You DO NOT need a common denominator to multiply or divide fractions.

No.

No you do not.

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.

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

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Yes.

No only when adding or subtracting fractions a common denominator is needed

No, You only need a common denominator when adding or subtracting fractions.

You need a common denominator for both.

No, you only need a common denominator when adding or subtracting fractions.

Because the answers will be wrong when adding or subtracting them if they don't have a common denominator.

Because if there's no common denominator it'll be hard to simplify. And will cause you to get a headache.

The first step to take is find the lowest common denominator of the fractions which can be done by finding the lowest common multiple of the numbers.

A single number cannot have anything in common. To find a lowest common denominator, you need to be adding or subtracting at least two fractions.

You don't need a common denominator to divide fractions.

Yes.

You DO need a common denominator to add, subtract, or compare fractions. You DO NOT need a common denominator to multiply or divide fractions.

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