# [C.14] Matrix Addition and Multiplication

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Taught by TheMathDude
• Currently 4.0/5 Stars.
9826 views | 1 rating
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, you'll learn how to add, subtract, and multiply matrices using a graphing calculator. The instructor demonstrates adding and subtracting matrices element by element and shows how to do scalar multiplication. Matrix multiplication is also covered and the importance of the column of the first matrix matching the rows of the second is emphasized. This lesson provides a solid foundation in matrix arithmetic, including adding, subtracting, scalar multiplication, and matrix multiplication.

Lesson Description:

Learn how to add, subtract, and multiply matrices on a graphing calculator.

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Questions answered by this video:
• How do you add, subtract, and multiply matrices on a TI graphing calculator?
• What happens if you try to add or subtract two matrices with different dimensions on a TI graphing calculator?
• How can you access matrices on a TI graphing calculator after entering them?
• What does ERR:DIM MISMATCH mean with matrices on a TI graphing calculator?
• How do you multiply a number by a matrix on a TI graphing calculator?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson shows how to take matrices that you have already entered and using a TI graphing calculator to perform operations (addition, subtraction, and multiplication) on the matrices. The steps involved in these matrix operations are shown and explained. This speeds up these operations a lot compared with doing them by hand.