To what extent does she need to be fast or fluent in order to do well in higher level math, like algebra?
Unfortunately, there is no correct answer to this question, because this strongly depends on the curriculum and your teacher. In general, algebra is not about long division and numerical calculations at all, but its implementation in textbooks... Instead of the problem 2x=4 they give you 1.9875x=3.7956
On the brighter side, it is most likely that your DD will be allowed to use a calculator. So, my advice would be not to bother, just wait for awhile and monitor what kind of problems does your DD do at school (or, even better, look in her textbook).
