# 3. Arithmetic operators

You are already familiar with many simple arithmetic operations: addition, subtraction, division and multiplication. The symbols used to represent these operations in a program are mostly the same ones you see in a maths textbook:-

**+ **for addition

**-** for subtraction

***** for multiplication

**/** for division

Arithmetic operators have two arguments, one on either side. Their position matters most for things like subtraction and division. 100/2 is very different from 2/100.

You can use multiple arithmetic operators on the same line, if you need to perform a complex calculation. The order that you carry out these calculations, called the 'order of operations' is BODMAS. This stands for

**B**rackets first**O**rder (numbers involving powers or square roots)**D**ivision**M**ultiplication**A**ddition**S**ubtraction

This lets you work out expressions such as

x 1 + ( 3 - 1) - 2^{3} + 10/3

in the same order that everyone else will use.

**Challenge** see if you can find out one extra fact on this topic that we haven't
already told you

Click on this link: What are arithmetic operators?