411 REFERENCE · Wikibooks
GCSE Mathematics/Matrices
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Adding/subtracting matrices
When adding or subtracting matrices you should add/subtract numbers in the same position, like this:
Matrices can only be added/subtracted if they are of the same size.
Multiplying matrices
When multiplying matrices by a number, you should multiply all the numbers inside them by that number, for example: