To add two matrices: add the numbers in the matching positions. The two matrices must be the same size. Buttons: "Matrix Size" change size from 1 to 4. "Setting" enter elements one by one. "Random" enter elements with random numbers. "Addition" matrix A + B. "Subtraction" matrix A - B.
It is more fun to use the online Matrix Calculator: https://www.mathsisfun.com/algebra/matrix-calculator.html
