Some people's brains process numbers and math better than others. I agree with Catty1 - see if you can get tutoring, if there is someone who could explain things in a different way that you would understand better.

I'm good at meth, but my sister is GREAT with math. Same teachers all through elementary school, so I attribute it to natural aptitude. That doesn't make math any easier for you to understand, but it may make your own self a little easier to understand.