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Q: Do you ever have to simplify if you find the LCD when subtracting fractions?

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When you are adding and subtracting fractions.

When adding and subtracting unlike fractions, it is necessary to find a least common denominator. It's the same process as finding an LCM. You can simplify a fraction by finding the GCF of the numerator and denominator and dividing them both by it.

When adding and subtracting unlike fractions, find the LCM of the denominators and convert them to it. In this case, it's called the least common denominator, but it's the same process.

When adding and subtracting unlike fractions, it is necessary to find the LCM of the denominators, called the least common denominator. Once you have found the LCD, you can convert the fractions to equivalent fractions with a common denominator and proceed with the adding and/or subtracting. Finding an LCM will have no effect on multiplying fractions.

When adding or subtracting fractions with different denominators and when reducing fractions to their lowest termsWhen adding or subtracting fractions with different denominators their lowest common multiple is needed and when reducing fractions to their lowest terms their greatest common factor is needed.

Related questions

Find a common denamonator.

When you are adding and subtracting fractions.

In order to find the LCD when adding or subtracting fractions

yes

Subtracting a mixed number is just subtracting fractions but with a whole number by a fraction. To subtract tun the mixed numbers into improper fractions and find the common denominator. Then you subtract the numerators.

Same as adding, multiplying, and dividing.

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

When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms

Because to add or subtract two fractions you first have to find equivalent fractions for both which have the same denominator.

When you are trying to simplify fractions.

When adding and subtracting unlike fractions, it is necessary to find a least common denominator. It's the same process as finding an LCM. You can simplify a fraction by finding the GCF of the numerator and denominator and dividing them both by it.

first u find a common denominator

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