NumberDeep Dive

Method: Adding/Subtracting with Different Denominators

Part of Fraction Operations — GCSE Mathematics

This deep dive covers Method: Adding/Subtracting with Different Denominators within Fraction Operations for GCSE Mathematics. Revise Fraction Operations in Number for GCSE Mathematics with 14 exam-style questions and 22 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 4 of 14 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 4 of 14

Practice

14 questions

Recall

22 flashcards

Method: Adding/Subtracting with Different Denominators

1 Find LCM of denominators

2 Convert each fraction to equivalent with LCM denominator

3 Add/subtract numerators (keep denominator)

4 Simplify the answer if possible

Keep building this topic

Read this section alongside the surrounding pages in Fraction Operations. That gives you the full topic sequence instead of a single isolated revision point.

Quick Reference: Fraction Operations Method: Multiplying Fractions Combining and Splitting Fraction Operations Overview

Practice Questions for Fraction Operations

Which of these fractions is the largest? ⅔ ¾ ⅗ ⅝

A. ⅔
B. ¾
C. ⅗
D. ⅝

1 markfoundation

Explain why you need a common denominator when adding fractions, but not when multiplying fractions.

2 marksstandard

Quick Recall Flashcards

Multiplying fractions

Top × Top, Bottom × Bottom 2/3 × 3/4 = 6/12 = 1/2 No need for common denominators!

Quick: 1/2 of 3/4

1/2 × 3/4 = 3/8 Half of anything: divide by 2 Or multiply by 1/2

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Quick Reference: Fraction Operations

Method: Multiplying Fractions