How to add and subtract fractions with different denominators and numerators?

Many times we need to add and subtract fractions with different denominators and numerators. When you add two fractions with different denominators, the result is always a fraction with the same denominator as the denominator of the smaller fraction.

How to add and subtract fractions with unknown denominators?

A fraction with an unknown denominator is denoted with a variable. To add or subtract fraction variables, you use the common denominator method and perform the addition or subtraction. The common denominator of two fraction variables is the greatest number that the two denominators can share as a whole. The simplest example is solving a fraction with an unknown denominator using addition. If you have two fraction variables with unknown denominators, you need to find a common denominator for them. If the two denomin

How to add and subtract fractions with different denominators?

To add two fractions with different denominators, you need to find a common denominator for each fraction. If you have a denominator of 12 and a denominator of 6, you can change the 12 into two 6s. Then, add the two new denominators together. The answer will be in terms of 12. To subtract, change the denominator of one fraction into the opposite denominator of the other fraction. This will make the denominator of the first fraction the same as the denomin

How to subtract fractions with different denominators?

If you have two fractions with different denominators, you can perform a subtraction by treating the numerators as the numbers you're subtracting from each other. For example, if you have a fraction with an 8 in the denominator (denoted by a ⁄), you can subtract that from a fraction with a 20 in the denominator by treating the 20 as a number you're subtracting from eight. To do this, you can either multiply the 20 by the reciprocal of the denomin

How to add and subtract mixed fractions?

Addition and subtraction of mixed fractions is similar to adding and subtracting the same denominator—the only difference is that you need to use a mixed fraction model. In this model, the denominator consists of the sum of the denominators of the fraction components, and the numerator consists of the sum of the numerators of the fraction components. So, if you are given the mixed fraction and and the denominator is 4, you need to add the denominators of each fraction and