He can multiply and divide by skip-counting, but he has yet to memorize his multiplication tables.
My two kids were the same. I think memorization is very dry and doesn't have the same appeal as calculating

At DS8's 3rd grade parent/teacher conferences, the teacher commented that "obviously he has his math facts down". I explained to the teacher that I don't think he does, but he can add in his head very quickly. Whatever works at this point is fine by me.

I think so too... The important thing is that they're getting the answers right and building skills. I think once the math becomes complex enough to make the adding in their heads too time consuming, they'll do the memorizing because it's faster that way. (I hope, anyway ;-) lol