Adding and Subtracting Matrices
Adding, Subtracting, and Matrices, Oh My!
It's simple to add and subtract matrices, but they must always be the same size for it to work. The answers are always the same size too. Check it out:
All you do is add the entries in each corresponding place:
Subtraction? Same idea.
Now we just subtract the entries in each place:
Looks tough, but as long as you don't lose your place, you're golden. But remember, they must be the same size. And a 2 × 3 is not the same as a 3 × 2, for example.