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!
5ibelius9insterbergThis happens all the time, at least in Germany. My teachers did it, and I do it too.
The picture is probably still ragebait.