# Maths KS2: Adding and subtracting fractions

Amongst the ruins of an ancient city, Olivia and Hassan learn how to add and subtract fractions.

Archimedes explains how to perform subtraction using the fractions of the ruins and compiling them together, and with this new knowledge they're able to create a beautiful statue of Hypatia, before moving onto the next part of the mathematical maze.

This short animated film is from the BBC Teach series, Hyaptia's Mathematical Maze.

### Teacher Notes

Before watching the film

Prior to this lesson you may wish to introduce students to other relevant topics, for example:

• Common factors
• Common multiples
• Equivalent fractions and converting

During watching the film

Depending on your lesson’s focus, you may wish to pause the film at certain points to check for understanding by asking questions such as:

• What are the rules for adding and subtracting fractions?
• Why do we add and subtract the numerators but not the denominators?

Final question:
A chariot travels from the temple to the outpost. In the morning, it completes ²⁄₃ of the journey. In the afternoon, it completes ¹⁄₅ of the journey.

What fraction of the journey has been completed altogether? What fraction of the journey is left to travel?