# Arithmetic/Introduction

Arithmetic is the study of numerical quantities. At least a basic understanding of arithmetic is fundamental in the study of algebra and many other mathematical studies.

## Basic Operations

There are four basic operations one can perform on different numeric quantities (as well as other mathematical objects which you will encounter later). These are:

It is also important to understand that the equals sign (in this book, '${\displaystyle =}$' ) means that the things on both sides are of equal value, and that ${\displaystyle =}$ is not an operator.
When you see an ${\displaystyle =}$ sign, say to yourself Same value, different appearance.