# How to do Calculations with a Number line

In math Calculations, a number line can be defined as a straight with numbers placed at equal or segments along its length.

A number line can be extended infinitely in any direction and is usually represented horizontally. A knowledge of the properties of numbers is fundamental to the study of mathematics. Students who possess this knowledge will be well-prepared for the study of all aspect of mathematical Calculations.

A number line can also be used to represent both positive and negative integers as well.

Writing numbers on a number line makes comparing numbers easier. Numbers on the left are smaller than the numbers on the right of the number line.

A number line can also be used to carry out addition, subtraction and multiplication. We always move right to , move left to  and skip count to . Much of the terminology used in this post can be most easily illustrated by applying it to numbers. For this reasons we strongly recommend that you work through this fundamental concept even though it is familiar. Let us start with number line that we learnt in secondary school, a useful way of picturing numbers is to use a number line. Here positive numbers are represented on the right-hand side of this line, negative numbers on the left-hand side. Any whole or fractional number can be represented by a point on this line which is also called the real number line, or simply the real line.