Adding matrices is easier than you might think! Just find the corresponding positions in each matrix and add the elements in them! This tutorial can show you the entire process step-by-step.
How do you combine a positive and a negative number? This tutorial shows you how. You even get to see it explained with a number line!
To subtract matrices, you need to make sure that the matrices have the same dimensions. If they do, match up the corresponding positions in each matrix and subtract away! This tutorial takes you through the steps of subtracting matrices.