# Multiplying matrices featuring a TI-Nspire

Taught by MrA
• Currently 2.0/5 Stars.
9804 views | 2 ratings
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, you'll learn how to multiply matrices by hand and on a TI-Nspire graphing calculator. Multiplying matrices is done by taking rows and columns, multiplying them left to right on the first matrix and top to bottom on the second matrix. The order in which you multiply matrices matters, and the middle numbers must match for the matrices to be multiplied. The identity matrix is also introduced and is useful for multiplying matrices without changing the answer. The TI-Nspire makes matrix multiplication easier by allowing you to store matrices as variables and quickly multiplying them together.

Lesson Description:

Learn how to multiply matrices by hand as well as on a TI-Nspire graphing calculator.

• How do you multiply matrices?
• What is matrix multiplication?
• How do you multiply matrices on a graphing calculator?
• How do you enter a matrix into a graphing calculator?
• How do you use matrices on a TI-Nspire?
• How do you use templates on a TI-Nspire?
• What is the identity matrix?
• #### Staff Review

• Currently 4.0/5 Stars.
This video goes through a couple of examples step by step showing how to multiply matrices. It also shows the simplicity of entering matrices using a TI-Nspire as opposed to other graphing calculators. The resources are especially helpful, with many example problems and tutorials. This is a very good video from a student who has seen matrices before but is struggling with how to multiply them.
• #### vidsdmote

• Currently 1.0/5 Stars.
Terrible - audio and video do not match, but what is worse is that there is not enough video displayed as the lesson unfolds. Also audio has a wavy sound.