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# Definition of Number

A number is an idea that is used to count or measure something. It is really just in our minds. We use numerals to represent numbers.

In the picture, Lucy is thinking of a number: the number "one", because she is thinking of one ball. If she wanted to communicate that idea to us, she'd probably bark once, or thump her tail on the floor once.

There are many different types of numbers. Some of them are whole numbers (1,2,3,4, etc), integers (-1,0,1, etc), decimals (-1.73, 2.578 etc) and fractions $\left(\dfrac{1}{2}, \dfrac{23}{38}\right)$.

### Description

The aim of this dictionary is to provide definitions to common mathematical terms. Students learn a new math skill every week at school, sometimes just before they start a new skill, if they want to look at what a specific term means, this is where this dictionary will become handy and a go-to guide for a student.

### Audience

Year 1 to Year 12 students

### Learning Objectives

Learn common math terms starting with letter N

Author: Subject Coach
Added on: 6th Feb 2018

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