If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Learn what irrational numbers are. Also learn how to classify numbers as whole, integer, rational, and irrational.
Learn what rational and irrational numbers are and how to tell them apart.
Learn how to tell which numbers are rational and which are irrational.
Practice identifying whether numbers are rational or irrational.
Learn how to classify numbers as whole numbers, integers, rational numbers, and irrational numbers.
Practice classifying numbers as whole, integer, rational, and irrational.