Adding and Subtracting Unit Fractions — Interactive Lesson (Ages 11–13)

What happens when you subtract a unit fraction from itself? This 15-slide interactive lesson introduces unit fractions and how to add and subtract them.

Mastering Unit Fractions in Year 7–8 Maths

A unit fraction is a fraction with a numerator of 1. Students learn to understand what a unit fraction is, then to add and subtract unit fractions. They use an image to complete a calculation, evaluate expressions, complete missing denominators and place the answer on a number line. They also work out how many of a fraction make a whole, such as how many sevenths are needed, and are reminded of equivalent fractions.

What’s Included

• 15-slide interactive lesson on adding and subtracting unit fractions
• Learning objectives on understanding and calculating with unit fractions
• Picture-based calculations and missing-denominator questions
• A number line activity and a making-a-whole question
• A review quiz with instant feedback

Key Benefits for Students

• Builds a secure understanding of unit fractions
• Links fraction calculations to pictures and number lines
• Reinforces equivalent fractions
• Instant feedback on answer questions

Why Teachers Love It

• No prep — ready for whole-class teaching on an interactive whiteboard
• A concise lesson that fits a single session
• Self-marking questions support independent practice
• Suits teaching, revision and homework
• A gentle first step before adding any fractions

Love this? You’ll love…

• Add And Subtract Fractions: Same Denominators — Interactive Lesson (Year 7)
• Adding and Subtracting Mixed Numbers — Interactive Lesson (Ages 11–14)
• Adding and Subtracting Fractions with Different Denominators — Interactive Lesson (Ages 11–14)

A dependable start to a KS3 fractions topic, giving students a simple, visual entry to adding and subtracting fractions. Unit fractions are the building blocks for every later fraction calculation.

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FAQ

What year group is this for? KS3 — Years 7–8 (ages 11–13).

Does it use number lines? Yes — students place answers on a number line.

Is it self-marking? Yes, with instant feedback on the questions.