Thursday, May 14, 2020
Integrated Math 1: Riverdale High School
**Just FYI: Matrices ALMOST ALWAYS show up on the ACT. I have taught juniors for four years and every year students come to me after the ACT asking about matrices. I have learned to go ahead and make sure students are taught this information ahead of time!!!!
**Please remember, this is a very cursory, introductory lesson to matrices. There is a lot more to know, especially when it comes to the business world and their use in technology. Love you lots!! – Mrs. Gospodarek
What is a Matrix?
The size of a matrix is determined by the number of rows X the number of columns.
Each of the examples below would be said:
To add and subtract matrices, the matrices must be the same size.
For additional resources regarding addition and subtraction of matrices, please visit:
Technologically, you can use your TI-84 calculators to work with matrices as well. When you do your worksheet, try some using paper and pencil and others using your calculator. It is important to be able to use technology to solve problems too. There is no need to make things more difficult than they are.
Check out this YouTube video to learn how to input your matrix into your calculator!
Scalar Multiplication of Matrices
To practice work regarding matrices, go to https://cdn.kutasoftware.com/Worksheets/Alg2/Basic%20Matrix%20Operations.pdf
There are several problems regarding addition, subtraction, and scalar multiplication.