Mickey7Kid gave a reasonable answer without all the math bullshit
lugalWhy would you ask “How is this possible” when you expect the answer to be “it’s not”?
Because these “teacher is dumber than a child” pictures are always fake. I’ve never seen a teacher write corrections on a student’s paper. Are they doing that for every wrong question on every paper? That would take forever!
How are you supposed to learn if they don’t tell you how to do it better? Not writing corrections seems like bad teaching to me