horizontal vs. vertical (stacked) +/- expression

Question

Hello,

What is it called when you take a math expression written like,

13 + 24 = ______

and switch it to read as,

  1  3

+ 2 4 ?

Does this have an actual name? What common core standard would it be? Thank you!

Answer 1

It is really place value of each digit in

each addend.

Guy