# Lesson 4: Using binary - numbers

Learning that computers use binary to carry out calculations, children perform their own addition and subtraction binary calculations

## Learning Objectives

Using simple operations to calculate bit patterns

Recalling how binary can be used to represent numbers up to 255

Recognising that computers use binary mathematically

Calculating I can carry out binary addition (and subtraction)

## Teacher Video: Using binary - numbers

## Presentation: Using binary - numbers

I have completed this lesson