Khan Academy: Basic Matrix Operations: Scalar Multiplication

In this basic matrix operations activity, students performed the given operation for the given matrices. This four-page activity contains 24 problems. Answers are provided on the last page.

A video introducing matrices.

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

A brief video correcting a notational mistake that was made in the previous video on how scalar multiplication affects the determinant. The formula in the previous video shows the entries being multiplied by the sub-matrices, when really...

Adding and subtracting matrices.

Find the matrix that is a result of multiplying a given matrix by a given scalar. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Solve equations where the unknown is a matrix by using multiplication by a scalar. Students receive immediate feedback and have the opportunity to try questions repeatedly or receive hints.

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...

Scalar multiplication equations can be a drag. Scholars determine missing matrices to make correct scalar matrix multiplication equations. They place the correct matrix into the equations within the interactive resource and analyze the...

A video about the union and intersection of sets. [7:44]