My dad tested me every day on a few random times tables questions. I do agree that first the child has to understand how multiplication tables work, but then it's a matter of getting them in your head - and I still can immediately answer any multiplication table question. It takes a bit of time and effort on your part, but it's a lot easier than fiddling around with fingers!
what is this behavior called does it have a name?
But hey, I got by.

