We have all seen the internet memes and questions asking you to use PEMDAS to solve the question or riddle. I watched a friend of mine doing homework with her little one, and he kept questioning, ‘yes, but who said we must do it like this?” Yes, exactly; who said we must do it like this? For those of us that went to school in the pre-PEMDAS era, this … [Read more...] about So who said PEMDAS is right?