Originally Posted by Val
She got the half-inch part wrong. Apparently she should have rounded down to 2 1/2 inches, as the sheet meant HALF inch literally. Full inches don't count. If it had been exactly 3 inches, she should have presumably rounded to either 2 1/2 or 3 1/2 inches. (???)

I don't see myself tolerating this, although I can't immediately think of a productive way to bring this up with the teacher.