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

Q: What you need to add or subtract fractions?

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it stay the same when you subtract fractions and when you add fractions.

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

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

it is important to learn how to add and subtract fractions because we can use it when a time comes , when we have our own business and others .

Because to add fractions, the denominators must be equal.

Related questions

it stay the same when you subtract fractions and when you add fractions.

add? dont you mean subtract?

Make the fractions equivalent then subtract

because it would be diffcult to understand.[you don't add or subtract the demonters]

To add and subtract fractions, you need common denominators. To find the common denominator, find the LCM of the denominators you wish to add or subtract.

To get the right answer when you add or subtract unlike fractions.

I am not entirely sure what you mean, but if you need to add, subtract, or compare two fractions, they need to have the same denominator.

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

In fractions, you can NEVER add or subtract

So that you only have to add/subtract the numerator which makes it much easier.

You need common denominators. Then add or subtract the numerators. If the answer is an improper fraction it is common practice to reduce it to a mixed number.

Similar fractions are fractions with the same denominator. In order to add or subtract fractions they need to be similar.