That is interesting. I'm pretty excellent at math concepts in general (750 SATs in math once upon a time) but can't do arithmetic in my head to save my life. It

That is interesting. I'm pretty excellent at math concepts in general (750 SATs in math once upon a time) but can't do arithmetic in my head to save my life. It wouldn't surprise me at all if there's a relationship there, especially for processes like multiplication or long division where you have to hold an intermediate result.