Girl, you're more smart than you realize. For one, you're freakin' smart in writing! I mean, your stories are awesome! I mean, if you ask me, I think everyone's smart in their own way. :o
Also, if you're looking to be math smart, just ask help like I did. If you're the quiet type, email or write to your teacher about it. But it's all right to just ask. And parents and siblings are always there for you. Go to school help sites such as Khan Academy and IXL which both helped me a lot. Make sure you're getting everything and nothing seems to be confused.