Our latest installment of *Math From Scratch* includes the introduction to matrices, including their addition, subtraction, multiplication and division.

*Math From Scratch* includes the introduction to matrices, including their addition, subtraction, multiplication and division.

Some editing notes:

“… are unwieldy beasts with few, if any, practical usage” should either change usage => uses or few => little.

“Thus, if A is an n x m matrix and B is also an n/timesm matrix …”

“In this manner, A as expected” seems to be missing something.

“Let A by an arbitrary n x n matrix …”, by => be.