# How to write algebraic notation

## Home learning focus

In this lesson, you will learn how to write algebraic notation. Algebra uses letters to represent unknown values.

This lesson includes:

one video

one activity

# Learn

Algebra uses letters to represent unknown values. Unknown values are commonly represented by the letters ** x** and

**. There are several principles you need to know to be able to use algebraic notation. Find out more in this short video from BBC Bitesize.**

*y*## How does algebraic notation work?

Let's say that **x = 5** and **y = 10** in the following equations.

Therefore...

**x + 2 = 7****3x = 15**(when multiplying don't include the multiplication symbol)**3x + 2 = 17****x² = 25****4x² = 100****xy = 50****2xy = 100**

## Useful vocabulary

Read the pages below from Collins for some useful vocabulary and further explanation about how to write algebraic expressions.

# Practise

## Activity 1

**Worksheet**

Complete this worksheet from Twinkl about forming algebraic expressions.

## Activity 2

**Using letters to represent numbers**

Click Expressions + in the **BBC Bitesize Daily – Maths – Week 1,** *Year 7: Thursday* section.

Activity provided by SAM Learning.

## Activity 3

**Worksheet: Sequences, functions and graphs**

Complete this activity from Whizz Education about sequences, functions and graphs.

Click here for the answers.

# There's more to learn...

Have a look at these other resources around the BBC and the web.