Needless to say, I recommend Saxon (link above). You get their homeschool kits, which have answer books. Their web site will help you figure out what level to start at.
And no - I have no affliation with them.
Cool, i checked out the link. I think this is something i really need to do. Math is soooo important. The problem with the school system is they never never tell you how important it will be using real world examples. All they tell you is YOU NEED TO LEARN or else. U need to learn. I said zzzzzzzzzzzzzzzzzzzzz ;)