What to the what?
We like reversible processes. If I earn 5 dollars, I want to be able to spend 5 dollars. Subtraction undoes addition. It is the inverse process. All is well, until you subtract 5 dollars from your account that only has 3 dollars in it. You might have some negative feelings about that. Multiplication has an inverse process … Continue reading What to the what?
Footpath Math: Chalk it up to a math geek 