[GraceG]

(5 + 5)=10
(10 +5)=15

Screw you common core, there is no “correct way” in math.

It is like thinking about the “climate” common core is a orthodoxy that is put in place to control HOW you are SUPPOSED to THINK.

Not “TO THINK”

[NorthMountain]

there is no “correct way” in math.

I disagree. There are definitely wrong ways. If you were to say that there are often multiple correct ways in arithmetic and mathematics, I'd agree with you.