# 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 y. 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.

## 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.