Varsity Tutors
Varsity Tutors: Hotmath: Matrix Multiplication
A large set of problems present a variety of practice with matrix multiplication. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button...
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Matrix Multiplication
Students learn about matrix multiplication. Topics examined are identity matrices and properties of matrix multiplication. The tutorial consists of class notes, examples, and practice problems. Review exercises and a chapter quiz are...
University of Minnesota
University of Minnesota: Math Insight: Multiplying Matrices and Vectors
A clear explanation of how to multiply a matrix by a vector and a matrix by a matrix. A follow-up page provides additional examples.
Purple Math
Purplemath: Scalar and Matrix Multiplication
With several easy-to-understand examples worked out, this lesson demonstrates the steps needed to multiply a matrix by a scalar (a constant). True "Matrix multiplication," where two matrices are multiplied to eachother is also...
Purple Math
Purplemath: Matrix Multiplication/the Identity Matrix
Definitions, examples, and detailed explanation of matrix multiplication and the identity matrix.
Texas Instruments
Texas Instruments: Numb3 Rs: Air Hockey
Based off of the hit television show NUMB3RS, this lesson introduces students to a couple applications of matrices. Namely, a competition matrix is manipulated so as to rank included players, squared to see how opponents did, and finally...
Math Medics
S.o.s. Math: Multiplication of Matrices
This tutorial gives students an introduction to matrix multiplication with definitions and examples.
OnlineMathLearning.com
Online Math Learning: Multiply a Vector by a Matrix
Examples, solutions, videos, and lessons to help students learn how to multiply a vector (regarded as a matrix with one column) by a matrix of suitable dimensions to produce another vector. Work with matrices as transformations of...
Khan Academy
Khan Academy: Multiply Matrices
Find the result of the multiplication of two matrices. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Purple Math
Purplemath: Matrix Inversion: Finding the Inverse of a Matrix
Inverse matrices are very useful for solving matrix equations. But, given a matrix, how do you invert it? How do you find the inverse? The technique for inverting matrices is kind of clever. For a given matrix A and its inverse A-1, we...
Analyze Math
Analyze Math: Matrix Addition and Multiplication
Learners explore the discrete mathematics topic of matrices. The tutorial demonstrates how to add and multiply matrices. Some topics explored are scalar multiplication, multiplication of two matrices, square matrices, and addition of two...
CK-12 Foundation
Ck 12: Algebra: Limitations of Matrix Multiplication
[Free Registration/Login may be required to access all resource tools.] This lesson shows you how to determine if two matrices can be multiplied together and explains that the commutative property does not apply.
CK-12 Foundation
Ck 12: Matrix Multiplication
[Free Registration/Login may be required to access all resource tools.] A collection of resources that teach students that, unlike multiplication of numbers, matrix multiplication for square matrices is not a commutative operation, but...
CK-12 Foundation
Ck 12: Matrix Multiplication
[Free Registration/Login may be required to access all resource tools.] Add, subtract, and multiply matrices of appropriate dimensions.
CK-12 Foundation
Ck 12: Algebra: Matrix Multiplication
[Free Registration/Login may be required to access all resource tools.] This lesson explains how to multiply two matrices and presents practice exercises.
Cool Math
Coolmath: The Identity Matrix
Reference material and practice problems for the identity matrix.
Khan Academy
Khan Academy: Adding & Subtracting Matrices
Learn how to find the result of matrix addition and subtraction operations.
Math Notes and Math Tests
Pre Calculus Notes: Operations With Matrices [Pdf]
Students explore operations with matrices. Topics examined are matrix addition, scalar multiplication, matrix multiplication, and identity matrices. Class notes and examples are included.
Sophia Learning
Sophia: Matrix Multiplication: Lesson 3
This lesson introduces matrix multiplication, distinguishes it from multiplying by a scalar, and provides examples of the operation. It is 3 of 2 in the series titled "matrix multiplication."
Sophia Learning
Sophia: Matrix Multiplication: Lesson 5
This lesson introduces matrix multiplication, distinguishes it from multiplying by a scalar, and provides examples of the operation. It is 5 of 2 in the series titled "Matrix Multiplication."
Sophia Learning
Sophia: Multiplying Matrices by Scalar Values: Lesson 3
This lesson explains how to multiply a matrix by a scalar. It is 3 of 5 in the series titled "Multiplying Matrices by Scalar Values."
Sophia Learning
Sophia: Multiplying Matrices by Scalar Values: Lesson 5
This lesson explains how to multiply a matrix by a scalar. It is 5 of 5 in the series titled "Multiplying Matrices by Scalar Values."
Sophia Learning
Sophia: Multiplying Matrices by Scalar Values: Lesson 1
This lesson explains how to multiply a matrix by a scalar. It is 1 of 5 in the series titled "Multiplying Matrices by Scalar Values."
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Compatible Matrices
Find a quick, concise explanation of how to compare matrices to see which can be multiplied. Several examples are given to illustrate which matrices can and can not be multiplied.