Matrix Multiplication

To find out if you can multiply two matrices you have to find the dimension statement. The dimension statement states that in order to multiply matrices the first matrix's columns must have the same amount of columns as the second matrix's rows.
Dimension Statement Example: 2X2 times 2X3
The highlighted numbers above show that these two matrices can be multiplied.

The size of the new matrix will be the size of the first matrix's rows by the second matrix's columns.
Example: 2X2 times 2X3
The new matrix's size is 2 rows X 3 columns

To multiply matrices you multiply the first matrix's rows by the second matrix's columns.

Example: