I definitely understand what you're saying. You learn to read, then read to learn, as they say. If you can't read, it's hard to advance in other topics. But, it's wonderful! that you're looking for ways to develop this interest.
http://www.criticalthinking.com
Critical Thinking Company has some great products, like math analogies, complete the picture and balance books (with weight equivalents). These will not only be great for your dd's math, but will also really help her on standardized testing. LOL - I don't work for this company, btw, but my kids really like their products. There are also some other ones, logic stuff, that my kids have gotten as software and I think a fair bit can be done without reading.
http://www.etacuisenaire.com/catalog/department?deptId=MATH&d0=MATH
There are also lots of great math manipulatives (see above link) that are fun for kids to use. Even simple stuff like Tanagrams that you can get at Target.
All these things are wonderful for getting her brain thinking. It doesn't have to be reading! In fact, three of my four were early readers (although I often comment that the best reader, now 17 and an English major in college was the only one who read at a more normal age)... and for the early years, my boys definitely preferred hands on stuff. Ds1 is 10 now and will read for hours, but ds8 still likes the building, doing, etc... and usually doesn't read for more than 30 minutes at once.
It definitely is more "straightforward" for the early readers and YES, it does put a sign on their forehead. I'm not embarrassed to say that I encouraged my kids to discuss what they were currently reading with their teachers as a way to get their teachers clued in that they were not the average kid. OTOH, neither is your dd and you should talk to her teachers about her math ability and see what you can do to continue to encourage that throughout her school years.
Good luck!
Theresa