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

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

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

Yes.

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.

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

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

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.

Whether the numerators are the same or not, you need to get the denominators to be the same. First, find the least common denominator. Then convert the fractions to equal fractions that use the common denominator. Then you can subtract the fractions by subtracting the numerators. Finally, look for common factors between the numerator and the denominator of the difference in order to put the answer in simplest terms.

Yes.

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.

Yes

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

Finding a common denominator makes it possible to add two fractions because it allows us to write each fraction as a multiple of a common (usually smaller) fraction. Subtracting fractions works the same way; find a common denominator so that the fractions involved are in the same terms.

No.

No.

No.

For subtracting and adding you cannot add or subtract unalike things. For multiplication and division you can multiply by whatever you want. In some maths you even multiply by variables such as "x". Or divide by them.

When you are adding or subtracting fractions with unlike denominators, you need to find a least common denominator, or LCD. The process is the same as finding an LCM between two integers.

Find a common denamonator.