Virtual Nerd: How Do You Add Fractions With Different Denominators?

Combining fractions with unlike denominators. Wait! You can't do that! You have to have common denominators to combine the numerator of fractions. Here's a quick review of changing the denominator by multiplying each fraction by that...

Want to add fractions? Well, if they have the same denominator it's going to be so easy. Just add the numerator values together and keep the denominator the same. Easy as that.

Having a common denominator is the best thing to have when subtracting fractions. If you have a common denominator then all you have to do is subtract the numbers in the numerator.

Having a common denominator is the best thing to have when subtracting fractions. If you have a common denominator then all you have to do is subtract the numbers in the numerator.

Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.

Combine fractions that have unlike denominators and a variable. As usual the variable needs to get isolated. Then find the least common denominator so you can combine the fractions. Finally put it all back together.

Watch how to subtract fractions with different denominators by finding a common denominator. [3:27]

To subtract fractions with like denominators just subtract the numerators and put the result over the common denominator. Watch this video tutorial to see the process in action. [1:54]

You have two algebraic fractions to add together so what do you do now? You say yippee because they have a common denominator. This means that all you have to do is combine the like terms in the numerators. This would be a good segment...

How can you tell if 2 fractions are equal or different when they have different denominators? Watch this video to find out! A tutorial on common denominators, this video explains each step necessary to find common denominators, create...