# Mean average and equal shares

Spine 2: Multiplication and Division – Topic 2.26

Primary
KS2
Year 6

Mastery PD Materials

### Introduction

Understand the concept of mean average and learn how to find the mean of a set of data. Use the mean to compare sets of data and learn when it is appropriate to use the mean.

### Teaching points

**Teaching point 1**: The mean is the size of each part when a quantity is

shared equally.

**Teaching point 2**: The mean is defined as the sum of all the numbers in a set of data divided by the number of numbers/values that make up the set of data. If we know the mean of a set of data and the number of numbers/values in that set, we can calculate the total of the set. The mean of a set changes if the total value of the set changes or if the number of numbers/values in the set changes.

**Teaching point 3**: The mean can be used to compare data.

**Teaching point 4**: The mean is not always an appropriate representation of a set

of data.