I'm not sure if the "Round up to the nearest 5, then the nearest
  10 until you reach your goal number" is necessarily going to be
  THE way that adding/subtracting is going to be taught in
  Florida; (this is the method that is generating ALL the
  controversy in Common Core Math) - but as far as State Standards
  go, the *requirements* for grade-by-grade really don't have to
  change a whole heck of a lot. And... apparently, you STILL have
  to "show your work"; *and* if you do your math in a "different"
  way and get the right answer, you're still marked "wrong"
  because you didn't follow the steps they teach. *sigh*. I
  understand *why* they're trying to standardize the way people
  think about numbers... but... well, it's sort of like learning
  to touch-type. You don't HAVE TO USE THE HOME KEYS to type at
  top-notch speeds. I know two finger typists that rival *my* 110
  wpm speed. I like the homekeys because I'm lazy and don't like
  to move much. But I ALSO know that there are MANY ways to type.
  And.. there are MANY WAYS to get the same answer in math. To me,
  they should teach *and allow* _ALL OF THE WAYS_ to do math; When
  you ALREADY have mental models for math that *work* and are
  *correct*; but are different from whatever the "fad of the day"
  teaching-style is; you get marked as WRONG. And... when you're
  told you're WRONG when you have the right answer, is
  demoralizing to confidence; slows down advanced learners to a
  snail's pace.. and generates a "Why Bother Trying" attitude that
  can last for decades. Killing creativity at a young age kills
  future innovation. But at least the standards being reached for
  in Florida aren't changing much. I just hope the teaching
  METHODS don't get too wacky. To know their effectiveness a
  generation has to grow up with the new methods; and... EVERYBODY
  is part of the grand experiment. *sigh* I guess education has
  always been a series of gigantic social experiments