This introduction covers Why Use Letters? within Algebraic Notation for GCSE Mathematics. Revise Algebraic Notation in Algebra for GCSE Mathematics with 13 exam-style questions and 4 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 1 of 6 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 6
Practice
13 questions
Recall
4 flashcards
Why Use Letters?
Imagine you're buying apples at a market. You don't know how many you'll buy yet, so instead of writing "cost = 50p × ???", you write "cost = 50p × n" where n is the number of apples. That's algebra! Letters are placeholders for numbers we don't know yet - they're like empty boxes waiting to be filled.
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