As long as the kid understands how to do it, I'm okay with it. It's not about me as the teacher, it's about the student. I think if schools fully understood what the CCSS were intended for, it would actually be beneficial. However, I think a lot of schools are using CC as an entirely new curriculum - which isn't what CC is at all. As long as the student understands it, then my job as a teacher is to give them their best opportunity to succeed.
Also, to my knowledge, each state has their own take on CC, so what I'm used to in Wisconsin is most likely different from RI or Ohio. Here they're just a set of standards, but it's up to the individual teachers or districts to decide how they should teach the different subjects.