For 8*6? I definitely don't know either of the 8 or 6 tables by memory.

I of course know how to figure it out. Let's see my instinct might be to do 8x2 first because I do know most of the 2s. Then 16x3 I can do in a few steps of addition. 20+12+16 then 48

And yes then I checked on my calculator because I'm posting this online and don't want to look like an idiot.