Rules for Adding and Subtracting Matrices - dummies

Rules for Adding and Subtracting Matrices

By Yang Kuang, Michelle Rose Gilman

To add or subtract matrices, you have to operate on their corresponding elements. In other words, you add or subtract the first row/first column in one matrix to or from the exact same element in another matrix. The two matrices must have the same dimensions; otherwise, an element in one matrix won’t have a corresponding element in the other.