One idea for homeschooling (since you are doing so) is to use Math Games-- file folder games.... there's a book with reproducibles in it that has a BUNCH of basic math facts drills organized as simple board games. DD found those much more tolerable than any other kind of drill at this age.

File Folder Games for Math

You could also play a regular board game with a pair of D-20's from a local gaming store. That way you could practice the subtraction facts that she doesn't know.

Schrödinger's cat walks into a bar. And doesn't.