[chc]

Really? Because I found that my inability to do matrix math on my second Math 100 exam corresponded pretty well with my lack of understanding about how matrix math worked.

[mapphusel]

Good point, but there is context missing.

Are you interested in matrix math, or were you merely trying to pass an exam?

Alternatively, if you are interested in matrix math, did the fact that you had to pass an exam make it harder to learn?

[burgerbrain]

Reading comprehension fail.

Probably related to why you do so poorly on tests.