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Q: How is the least common multiple used when adding and subtracting fractions?

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It helps with the adding and subtracting of fractions.

Adding and subtracting unlike fractions.

It is a common denominator: useful for adding or subtracting fractions.

When adding or subtracting unlike fractions, the LCM process is used to find the least common denominator.

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.

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It helps with the adding and subtracting of fractions.

To help with adding and subtracting fractions.

Adding and subtracting unlike fractions.

It is a common denominator: useful for adding or subtracting fractions.

When you are adding or subtracting unlike fractions.

Adding and subtracting unlike fractions.

Because when adding or subtracting fractions the denominators must have the same values

If their denominators are different then find their lowest common denominator by means of their lowest common multiple remembering to adjust their numerators accordingly before adding or subtracting.

When adding or subtracting fractions with different denominators then the least common multiple amongst them is needed to find the lowest common denominator.

A Common Denominator

The least common multiple of 6 and 9 is 18.

Anything having to do with adding or subtracting unlike fractions.

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