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Q: Can you use Lcd when subtracting fractions?

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When adding or subtracting fractions with different denominators then their LCD must be found in order to carry out the calculations.

In order to find the LCD when adding or subtracting fractions

Only if the problem asks you too

LCD means lowest common denominator which is needed when adding or subtracting fractions that have different denominators.

The Lowest Common Denominator is needed when adding or subtracting fractions.

When adding or subtracting fractions with different denominators you must find their LCD and this done by finding their LCM

When adding or subtracting fractions with different denominators the LCD is found with the LCM.

yes you should use a common denominator when subtracting with fractions, it makes it much easier.

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.

Yes.

When you are adding or subtracting fractions.

Use the LCM when you are adding and subtracting unlike fractions. Use the GCF when you are simplifying fractions.

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