# Arithmetic

## What Is Arithmetic?

Arithmetic is a branch of mathematics that studies numbers and the operations applied to numbers.## Dictionary Definition

The Oxford English Dictionary defines arithmetic as "the science of numbers; the art of computation by figures."## Where Does the Word Arithmetic Come From?

Arithmetic comes from the Greek word "arithmētikḗ" meaning “counting”. 'Arithmos' is the Greek word for "number".## The Curriculum

The lessons are grouped into mini-curriculum to help you organise your learning. A brief description is given for each mini-curriculum. Click the**MORE**button to learn more.

## Operations and Their Order

Operations take numbers to create a new number.
The most common operations in arithmetic are adding, subtracting, multiplying and dividing.
In this mini-curriculum, you will learn about operations.

## Advanced Arithmetic

When numbers get larger than a single numeral, we must use place value and 'long' arithmetic.
In this mini-curriculum, you will learn about place value, long addition, long subtraction, long multiplication and long division.

## Factors

The factors of a number are those numbers that multiply to make that number. They divide exactly into the number.
In this mini-curriculum, you will learn about factors.

## Multiples

Multiples are the result of multiplying a number by another whole number.
In this mini-curriculum, you will learn about multiples.

## Powers

Powers are the result of multiplying a number by itself.
In this mini-curriculum, you will learn about the parts of powers.

## Laws of Exponents

The laws of exponents lets you do arithmetic with powers.
In this mini-curriculum, you will learn about the laws of exponents.

## Reciprocals

Reciprocals of a number are 1 divided by the number. They can be denoted by an exponent of −1.
In this mini-curriculum, you will learn about reciprocals.