This is something I have read people do. Napkin mathematics they call it. Richard Hamming has a chapter in the book The Art of Doing Science and Engineering.
I want to learn it. This helps a lot in guessing what the results should be before we go on proving/deriving it. A hunch. A spidey sense.
I want to learn it. This helps a lot in guessing what the results should be before we go on proving/deriving it. A hunch. A spidey sense.
I like it.