Khan Academy: Basic Matrix Operations: Matrix Addition and Subtraction

Two real-world activities to practice adding, subtracting and multiplying matrices to problem solve. Data from several Pro football quarterbacks is used in one activity to make some predictions based on their stats. Then the class takes...

Please Excuse My Dear Aunt Sally - or whichever mnemonic your students use for the order of operations - is the focus of this video. Sal takes viewers through various mathematical equations which require the use of the order of...

First demonstrating the improper ways of solving an equation (left-to-right, multiplication first), Sal shows viewers how the answer of an equation can be drastically incorrect by neglecting to use the order of operations. He uses...

A video introducing matrices.

A video of how to transpose a matrix. [3:42]

This lesson goes through three examples of matrix multiplication. Explains how the dimensions of matrices affect whether or not the matrices can be multiplied, how to determine if they can be multiplied, and what size the resulting...

This video shows addition of negative numbers on a number line, using absolute values. Practice problems are included. [5:41]

Learn how to do scalar multiplication with matrices. [2:17]

A video of basic set and subsets operations.

This video demonstrates how to evaluate expressions when a symbol is given rather than an addition, subtraction, multiplication or division sign. It provides four examples and utilizes variable substitution. Practice problems available....