R.M.
My younger sister was diagnosed with dyslexia in third grade. I was almost out of high school then, so I wasn't around for a lot of what they all went through to work with her, but I do remember a couple things. Something that affects a lot of kids in the reading area is trying to read black on white or white on black. Apparently it is harder for their brains to process. My mom bought these colored transparent overlays to go over the pages in her books, and her teachers would use colored markers to write on the white boards at school. The overlays helped immensely. They keep the words from swimming on the page and help with retention. (Interesting fact- Ozzy Osbourne has dyslexia and this is why he wears colored tinted glasses).
For math- my sister had a really hard time if she had to copy the math problem from the book onto paper. If she had a workbook, she had no problems. This was how we first noticed the problem. In her old school, they had no books so the teacher made photocopies of a workbook page, and she did fine. At her new school she had a book and suddenly couldn't do math. Once we looked at it we realized she was copying it wrong, not actually doing the math wrong. If this is your daughter's problem, maybe if you wrote the problems out for her on her paper and just let her solve them it would help. We did this with my sister for a few years, eventually she didn't need it done anymore. But she still checks and rechecks a million times. She is a special education teacher now, by the way. She pushed herself very hard, and there was a LOT of crying at our house but she did it. My mom still proofreads for her, and double checked every single paper she turned in during college. I would recommend asking her teachers for titles of books to get at the library to try to help her more at home. Every kid is different, it might take several things to help yours. Does she have an IEP and a person assigned to it? She needs to if not.