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Key Concepts

Key Concepts

Real numbers

The image shows a large rectangle labeled “Real Numbers”. The rectangle is split in half vertically. The right half is labeled “Irrational Numbers”. The left half is labeled “Rational Numbers” and contains three concentric rectangles. The outer most rectangle is labeled “Integers”, the next rectangle is “Whole Numbers” and the inner most rectangle is “Natural Numbers”.

Glossary

Irrational number

An irrational number is a number that cannot be written as the ratio of two integers. Its decimal form does not stop and does not repeat.

Rational number

A rational number is a number that can be written in the form \(\frac{p}{q}\), where p and q are integers and \(q\ne 0\). Its decimal form stops or repeats.

Real number

a real number is a number that is either rational or irrational.

This lesson is part of:

Properties of Real Numbers

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