This exam tips covers Common Mistakes within Rounding & Estimation for GCSE Mathematics. Revise Rounding & Estimation in Number for GCSE Mathematics with 13 exam-style questions and 6 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 5 of 6 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.
Topic position
Section 5 of 6
Practice
13 questions
Recall
6 flashcards
Common Mistakes
- WRONG: Counting leading zeros as significant (0.005 has 1 s.f., not 3)
- WRONG: Forgetting trailing zeros matter in s.f. (3.50 has 3 s.f., not 2)
- RIGHT: For estimation, round to 1 s.f. to make calculation easy
Keep building this topic
Read this section alongside the surrounding pages in Rounding & Estimation. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Rounding & Estimation
Round 4.673 to 1 decimal place.
A student says '3.50 and 3.5 are exactly the same number so they have the same number of significant figures.' Explain why the student is wrong.
Quick Recall Flashcards
13 questions on Rounding & Estimation — practise free
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