# BIDMAS codebreaker

Last updated: 15/11/2023
Contributor: Teachit Author
Main Subject
Key stage
Category
Number: BIDMAS (Order of operations)
Inside
Resource type
Worksheet

Use this fun codebreaker worksheet to help students practise using BIDMAS/BODMAS. They simply answer a series of questions applying the correct order of operations to crack the code and reveal a secret message.

This codebreaker makes a great activity for KS2 to KS3 transition or the end of term. Includes answers.

BIDMAS is the agreed order of operations when completing arithmetic calculations.

B is for brackets, I is for indices (or powers like 42 or 53), D is for division, M is for multiplication, A is for addition and S is for subtraction.

It is also important to remember that when you see division and multiplication together in a problem, or addition and subtraction together, work them out from left to right, in the order that you find them. The same applies if you have two of any of those operations e.g. two additions: work from left to right.

To crack the code, and solve the mystery of Agent Fox’s disappearance, solve all the calculations to spell the words, remembering to use order of operations (BIDMAS).

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