Countless messages on this forum have described a child's precocity in math and asked what to do about it. Well, there are as many people in the bottom 10% of math talent as in the top 10%, and we should not pretend otherwise. For a dose of realism one can read the following article from a college math instructor.

http://www.brianrude.com/fractionsquiz2.htm
Fractions My Algebra Students Can't Do.
Brian D. Rude
(Revised) 2008

"To see what is in front of one's nose needs a constant struggle." - George Orwell