Year 8 Interactive Maths - Second Edition

## Integers

Negative numbers are called negative integers and positive numbers are called positive integers.  Zero is neither a negative nor positive integer.

The set of integers consists of negative integers, zero and positive integers.  So:
The set of integers = {…, –3, –2, –1, 0, +1, +2, +3, … }

It is common practice to represent positive integers as 1, 2, 3, 4, …

Often we use a number line to represent the set of integers.

It is clear that a number on the number line is always larger than the number to the left of it.  For example:

#### Example 3

Represent the integers –5, –1, 2 and 4 on a number line.

#### Example 4

Represent the integers that are greater than –3 and less than 3 on a number line.

#### Example 5

Insert the symbol > between the following pairs of integers:

##### Solution:

Use a number line to answer this question.

#### Example 6

Insert the symbol < between the following pairs of integers:

##### Solution:

Use a number line to answer this question.