Learn How to Multiply Matrices

By Deb Russell, About.com Guide

A matrix is a rectangular array of numbers. A matrix’s dimension is in the form rows x columns. You must know what a matrix is prior to completing this tutorial.
There are two different types of multiplication one can do with matrices: scalar and matrix multiplication. Scalar multiplication is when a matrix is multiplied by a single multiplier, as opposed to another matrix, and it is of the form in the image.