# Natural Numbers(KS2, Year 4)

## The Lesson

A natural number is a whole number from 1 upwards: Mathematicians use the symbol to represent the set of natural numbers.

## Dictionary Definition

The Oxford English Dictionary defines a natural number as "a positive whole number (1, 2, 3, etc.)"

## Natural Numbers As Counting Numbers

A natural number is a counting number. Natural numbers are the numbers you would use to count objects. ## Natural Numbers on the Number Line

The image below shows the natural numbers on the number line. Note: The natural numbers are whole numbers only. They are not found in between the numbers shown.

## What Natural Numbers Are

Natural numbers are positive integers.

## What Natural Numbers Are Not

Natural numbers are not negative (such as −1) and are not fractions (part of a whole number, such as ½ or 0.3).

## What Natural Numbers Are (Usually) Not

0 is (usually) not a natural number. A child learning to count would not count zero objects. (Some mathematicians do count 0 as a natural number. We do not. The idea of 0 is more abstract and less natural - it was invented later. If you include 0, you have the whole numbers).
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