This key facts covers Standard Form Rules within Standard Form for GCSE Mathematics. Revise Standard Form 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 3 of 15 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 3 of 15
Practice
14 questions
Recall
22 flashcards
Standard Form Rules
| Type | Standard Form | Example | Ordinary Number |
|---|---|---|---|
| Large Numbers | a × 10ⁿ (n positive) | 3.5 × 10⁶ | 3,500,000 |
| Small Numbers | a × 10⁻ⁿ (n negative) | 2.7 × 10⁻⁴ | 0.00027 |
| Numbers 1-10 | a × 10⁰ | 5.2 × 10⁰ | 5.2 |
| Invalid Form | a < 1 or a ≥ 10 | 15 × 10³ ❌ | Should be 1.5 × 10⁴ |
Keep building this topic
Read this section alongside the surrounding pages in Standard Form. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Standard Form
Which of these numbers is written in standard form?
Explain why standard form is useful for writing very large or very small numbers.
Quick Recall Flashcards
14 questions on Standard Form — practise free
Instant marking, adaptive difficulty, and 22 spaced repetition flashcards. Free until your GCSEs.
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