Why Showing Working Matters in IGCSE Maths
In IGCSE Maths, most questions award method marks separately from the final answer. Even if your answer is wrong, clear working can earn you most of the marks. This guide shows you how.
How Mark Schemes Work
IGCSE Maths uses M marks (method), A marks (accuracy), and B marks (independent). You can earn M marks even with a wrong final answer if your method is correct.
Tips
- Write one step per line so examiners can follow your method
- Label your final answer clearly
- Never erase working — cross it out neatly if needed
What Counts as Working
Working means showing the mathematical steps between reading the question and writing the answer. Substitution into formulae, intermediate calculations, and algebraic steps all count.
Tips
- Write the formula before substituting numbers
- Show key intermediate values, not just the final answer
- For 'show that' questions, every step must be visible
Common Mistakes
Students lose method marks by doing too much in their head, overwriting previous work, or presenting steps out of order. Clarity is key.
Tips
- Use one column for calculations — avoid scattering work
- If you change your mind, cross out and rewrite clearly
- Number your working to match question parts
Key Takeaways
- Method marks can rescue a wrong final answer
- Write one step per line
- Show substitution into formulae before calculating
Want a personalised exam strategy?
Teacher Rig creates targeted revision plans based on your strengths and weaknesses.
Book a Free TrialRelated Pages
Frequently Asked Questions
Do I lose marks for wrong working with a correct answer?
Generally no — a correct answer usually earns full marks. However, in 'show that' questions, correct working is required regardless of the answer.
Ready to Improve Your Exam Performance?
Book a free trial class with Teacher Rig for expert exam preparation.