Classification of Numbers

In mathematics, not only there are many ways to represent numbers, but there are also ways to classify numbers. We classify numbers as: Natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers. This module will cover the most basic Classification of Numbers that we're accustomed to hear at this level. And quickly, you will discover that some numbers also belong to more than one group.Try to understand and then memorize what each classification means:

Real Numbers

Natural Numbers

1, 2 , 3 , 4 , 5 , 6 , 7 ... which are often called the set of natural numbers. Those same numbers also known as single digit numbers.


It includes the whole numbers and their opposites. The opposite of Zero is Zero….. 4, 3, 2, 0, 4, 3, 2,……

Rational Numbers

They are all numbers that can be written as fractions, where the numerator and denominator are both integers, but the denominator is not zero.

Irrational Numbers