So if you add these two fractions, your sum is going to have the same denominator, 15, and your numerator is just going to be the sum of the numerator, so it's going to be 3 plus 7, or it's going …

Learn how to add two fractions with different denominators. It can be challenging to combine fractions when the denominators don't match. It is important to find a common denominator. …

Assuming that the fraction part of the mixed number and improper fraction both have common denominators already, you just add the fractions the regular way, then apply the whole number …

To add fractions with different denominators, such as 1/2 and 1/3, you need to find a common denominator. The least common multiple of 2 and 3 is 6, so you can rewrite the fractions as …

Practice Up next for you: Equivalent fractions (fraction models) Get 3 of 4 questions to level up!

Watch how to use the least common multiple of the denominators to rewrite fractions, making them easier to compare or add. Created by Sal Khan and Monterey Institute for Technology …

When the denominators are the same, we can add or subtract the numerators directly. When the denominators are different, we need to find a common denominator first.

This is done by multiplying the denominators together or finding the Least Common Multiple (LCM) of the denominators, whichever is easier. Then, convert each fraction to an equivalent …

Practice Add and subtract fractions word problems (same denominator) Get 5 of 7 questions to level up!

In this lesson, you will practice adding and subtracting rational expressions with different denominators. You will use the least common denominator as your common denominator in …