This introduction covers What is Substitution? within Simplifying Expressions for GCSE Mathematics. Revise Simplifying Expressions in Algebra for GCSE Mathematics with 11 exam-style questions and 5 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 8 of 18 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 8 of 18
Practice
11 questions
Recall
5 flashcards
What is Substitution?
Think of a formula like a recipe. If a cake recipe says "2 × eggs + 100g flour", you substitute in the actual number of eggs to work out how much flour! Substitution in maths is the same - you replace the letters (variables) with actual numbers to calculate an answer.