[Torwald]

> (which is what common core does; it shows that 65+37 = 70+32, etc etc)

I did automatically 90+12 and I am old. How would common core improve my mathing?

[dorchadas]

It wouldn't improve yours if you're doing that, but the point of it is to teach the kids number sense and how numbers work and can be manipulated to make problems easier.