11+ Maths: Algebra Basics
21 October 2026
Algebra for 11+ made simple
Algebra is a key part of 11+ maths. It introduces children to the idea of using letters to stand for unknown numbers. This can seem strange at first, but it soon becomes routine with practice.
What are variables, expressions and equations
A variable is a letter (like x or y) that stands for a number we do not know yet. An expression is a group of numbers and letters joined by operations, such as 2x + 3. An equation is a statement that two things are equal, for example 2x + 3 = 11.
Worked example
Let's solve 2x + 4 = 10.
First, subtract 4 from both sides: 2x + 4 - 4 = 10 - 4.
This gives 2x = 6.
Next, divide both sides by 2: 2x ÷ 2 = 6 ÷ 2.
So x = 3.
The answer is x = 3.
Key insight: Why algebra matters
Understanding algebra helps children spot patterns, solve problems and think logically. These skills are tested in the 11+ and are useful for all maths topics.
How parents can help
Encourage your child to talk through each step when solving algebra questions. Practising with short, daily exercises builds confidence and makes algebra feel less mysterious.
