Surds can look unfamiliar, but they follow clear rules. The main goal is to keep exact values instead of rounding too early. A related next step is my Algebra revision guide.
Understand what a surd is
A surd is an irrational root left in exact form, such as the square root of 2. Students need to know when an answer should stay exact. A related next step is my Avoid these GCSE Maths mistakes to improve your exam performance guide.
Simplify using square factors
To simplify a surd, look for square factors such as 4, 9, 16, 25 or 36. This helps rewrite the expression in a cleaner form. A related next step is my Best GCSE and IGCSE Maths revision guides guide.
Practise operations
Students should practise adding like surds, multiplying surds, expanding brackets and rationalising denominators. A related next step is my Edexcel IGCSE Maths formula sheet guide.
Avoid decimal answers too early
Exam questions often ask for exact form. Rounding early can lose marks even when the method is mostly correct.
