A matrix (plural matrices) is an array of numbers.

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​What are the dimensions of this matrix?

​What is a matrix?

The matrices must have the same size/dimensions

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Find the missing elements.

​Adding Matrices

We can multiply matrices by a constant/number​

Fill in the boxes.

​Scalar Multiplication

Only m x n and n x p size matrices can be multiplied. The product matrix will be m x p (m and p may be the same number)

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Complete the product matrix

Matrix Multiplication

Form 1 X 3 cost matrix and 3 X 1 number matrix to find the sales for each indicated day

​Real Life Example (Matrix Multiplication