Because analogies sometimes miss the point entirely. And because some of you list app fans may someday have teenagers resisting Math.
  1. Arithmetic: subtraction is basically just addition
  2. Arithmetic: division is basically multiplication
  3. Calculus: integration is basically a bunch of addition
  4. Calculus: differentiation is basically subtraction
  5. Calculus: integration isn't differentiation at all, no matter what you learned in arithmetic
  6. Don't get left behind, take calculus.
  7. Dope!
    Obviously I don't know what the word "dope" means to any of you.