Classifying numbers: rational & irrational (Full video)

Khan Academy

Supporting grades: 8

Description: Given a bunch of numbers, learn how to tell which are rational and which are irrational. Created by Sal Khan. Which of the following real numbers are irrational? Well, irrational just means it's not rational. If you take the square root of a number that is not a perfect square, it is going to be irrational.

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