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For adding or substracting fractions first of all we should calculate the LCM( Lowest Common Multiplier) of the denominators in both of the fractions.

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Change dissimilar fractions to similar fractions

Q: When adding or subtracting fractions what should you do first?

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first u find a common denominator

When adding or subtracting fractions first make sure that the denominators are the same if they aren't then find the lowest common denominator and alter the fractions accordingly

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When you have a common denominator, the 2 fractions can be added by simply adding the numerators togethr and keeping the denominator. It might be harder to visualise this process without first getting a common denominator, thus having it might allow you to have a more accurate answer.

#1. when you are adding they are called addends #2. When you are subtracting they are called the first number is called a minuend and the second one is called a subtrahend #3. a sum is an answer to a addition problem #4. a difference is a answer to a subtraction problem

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common denominators.

you must make the fractions equivalent and with the same denomenator

first u find a common denominator

When adding or subtracting fractions first make sure that the denominators are the same if they aren't then find the lowest common denominator and alter the fractions accordingly

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

When adding or subtracting fractions with different denominators their lowest common denominator must be found first by using the LCM of their denominators

Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.Subtracting fractions is similar to adding fractions. If the fractions have the same denominator, you subtract the numerators. If the fractions have different denominators, you have to convert to a common denominator first.

Same as for adding: If the denominators are not equal, you must first find a common denominator, then convert both fractions to that common denominator.

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.

First, change it so that the two fractions have the same denominator (by changing the fractions into equivalent fractions). Once the two fractions have the same denominator, it is simply a case of subtracting the numerators, leaving the denominator the same. Finally, reduce the fraction to its lowest terms (if possible).

3/83/4 - 3/8 = 6/8 - 3/8 = 3/8Always find the common denominator first when adding or subtracting fractions.

First find the lowest common denominator and then adjust the fractions accordingly before subtracting the numerators