September 8, 2009
No CommentsHow to Add and Subtract Matrices
Description
This video explains the different types and sizes of matrices and what makes up each of them. It explains how to match up the sizes so you know if addition is possible. Several sample problems for addition are provided in the video.
Overview
While with normal numbers, you can add anything, some sets of matrices cannot be added. Matrices can only be added when they are the same size. Sizes of matrices are recorded by the numbers that are in each row and colum. For instance, a matrix with 3 rows and 3 columns would be referred to as a 3×3 matrix. If your matrices are the same size, you can add them. You then simply match up the numbers in your matrices to add them. This means that the number in the top right corner of the first matrix is added to the number in the top right corner of the second matrix, and the number they add up to will go in the same place in the matrix that is the solution to the problem. Subtraction works the exact same way as addition.
