Subtraction of Matrices

Subtraction works exactly like addition, just with elements subtracted instead of added. For two matrices $A = [a_{ij}]$ and $B = [b_{ij}]$ of the same order $m \times n$, their difference is

As with addition, subtraction is defined only when both matrices share the same order, since it works entry by entry on corresponding positions. A running example: if one matrix records the number of boys and girls in Group I of an activity and another records Group II, then $G_1 - G_2$ tel …