NumberExam Tips

Exam Tips

Part of Standard Form — GCSE Mathematics

This exam tips covers Exam Tips 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 14 of 14 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 14 of 14

Practice

14 questions

Recall

22 flashcards

Exam Tips

Always check: Is 'a' between 1 and 10?
Remember: Large → positive power, Small → negative power
Calculator: Know your EXP button
Addition: Convert to same power first
Show working: State each step clearly

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.

Common Mistakes to Avoid Numbers Beyond Imagination What is Standard Form?

Practice Questions for Standard Form

Which of these numbers is written in standard form?

A. 45 × 10³
B. 4.5 × 10⁴
C. 0.45 × 10⁵
D. 450 × 10²

1 markfoundation

Explain why standard form is useful for writing very large or very small numbers.

2 markshigher

Quick Recall Flashcards

Converting TO Standard Form

1. Move decimal to make 1 ≤ a < 10 2. Count places moved 3. Large (left) → positive power 4. Small (right) → negative power 780,000 → 7.8 × 10⁵

What is Standard Form?

A number written as a × 10ⁿ Where: • 1 ≤ a < 10 (at least 1, less than 10) • n is an integer (whole number) Example: 3.5 × 10⁴

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Common Mistakes to Avoid

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Standard Form