There are 44 ways to add two numbers together and all of them are correct. There are 38 ways to subtract, and again all of them obtain the same answer.
Some of the methods are easy and obvious, and others are not so intuitive, but do get the job done.
I don’t know much about common core, but from others I’ve talked to, it seems they have picked the most ambiguous methods for our children to learn.
Many ways to do a math problem. Many ways to skin a cat. My objection to Common Core is that the perps have chosen the most convoluted way to solve the problem and havedeclared that all other ways are wrong. Seriously.
This will be a major impediment to the child advancing in math. I guarantee that they won’t have the time to count dots and slashes to solve an advanced engineering problem.