Order of operations explained: BIDMAS for 11+ maths
21 October 2026
Why order of operations matters
Understanding the order of operations is essential for 11+ maths. It ensures calculations are completed correctly and helps children avoid common mistakes.
What BIDMAS stands for
BIDMAS is a helpful way to remember the right order to solve maths problems: Brackets, Indices, Division and Multiplication, Addition and Subtraction. Work through each step in this order.
How to use BIDMAS
When faced with a calculation, always start with anything in brackets. Next, tackle indices (like squares or cubes). Then do any division or multiplication, working from left to right. Finally, complete any addition or subtraction, also from left to right.
Worked example
Calculate 6 + (4 × 3) - 2²
Step 1: Brackets first. 4 × 3 = 12.
Step 2: Indices next. 2² = 4.
Step 3: Addition and subtraction from left to right. 6 + 12 = 18, then 18 - 4 = 14.
The correct answer is 14.
Key insight: Following BIDMAS gives your child a clear method to solve even tricky sums, helping them avoid errors and build confidence for the 11+ exam.
