[Diddley]

.....and I'm NEVER surprised that they do NOT teach this stuff in schools. . . . no imagination . . .

Many don't know the subject well (they can't use it with ease) and thus they don't really know how to teach it, IMO.

[goodnesswins]

Oh, c'mon.....I DON'T know the "subject" well....and I can figure out things like this to make math easier...but, maybe, it just donned on me, it's my systems type brain (I systemize EVERYTHING.)