Description: Learn how to compare absolute value like |-9| and |-7|. Created by Sal Khan. Let's do some examples comparing absolute values. So let's say we were to ask ourselves how the absolute value of negative 9, I should say, how that compares to the absolute value of negative 7. Now, when you take the absolute value of a number, you're really saying how far is that number from 0, whether it's to the left or to the right of 0.*Teacher Advisor is 100% free.