Spend some time learning maths.
I don't mean to say you shouldn't continue advancing in programming and I understand that you're in elementary school which is supposedly teaching you maths on a standard track but you are clearly a self-starter and would do well to advance independently.
Schools teach maths poorly. They generally focus on rote mechanics at a slow pace with very little to keep the interest of anyone and this is a big reason people (a) think they are bad at maths and (b) hate maths.
My elementary school barely advanced beyond arithmetic but, thanks in large part to programming, I independently advanced much faster than that. I still regret not pushing myself to go further but at least I got to spend most of my K-12 education ahead of the mathematics track.
I have no idea where you are in mathematics since "elementary school" is very broad, but BetterExplained (http://betterexplained.com/) is a great place to get some started. It can even give you a better grasp of addition and subtraction, let alone more advanced topics.