Interesting dialogue today:
Pauly: What's two plus two?
Me: I don't know, why don't you tell me?
Pauly (without counting fingers): It's 4! What's two plus two plus two?
Me: Can you figure it out?
Pauly (again, with no pause and without counting): It's six! What's three plus three?
Me: What do you think it is?
Pauly turns around and looks at the clock to attempt to figure it out that way. P: 7?
Me: No, count again.
Pauly counts it out on his fingers: It's six! Three plus three and two plus two plus two are both six!
I thought it was very interesting that he got 2+2+2 without even thinking about it, but had to count out 3+3.