Do I need to be a genius at math to study business?

In August I am starting my second semester in my business basics in HS. I love it because there is a lot of language. Icelandic and English and also a lot of math. I enjoy all these subjects very much but I wouldn’t count myself as a mathematician.
So I was wondering that does a person need to always receive straight A’s as they call them over there in the States (they are called 10’s here). I do always get over 5. Mostly 6–8s, which is pretty darn good in my opinion.
So what do you think?