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Substitution
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What substitution means

What substitution means

Flowchart showing substitution steps: replace variables with values, put negative values in brackets, work out brackets and powers, then multiplication and division, then addition and subtraction, with examples of hidden multiplication.

A variable is a letter that stands for a number. Substitution means replacing the letter with its given value, then working out the result.

Substitution Lesson

  1. IGCSE
  2. /Maths
  3. /Substitution

Step-by-step lessons on Edexcel IGCSE Maths Substitution. Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.

Lessons