Most web users have received at least one chain email or Facebook posting which contained a simple looking arithmetic problem that seemed to always produce two very different answers. Eventually, the comment section becomes a screaming match over how to properly execute the order of operations. 

But, according to Minute Physics, the order of operations is wrong, or at least ambiguous. Even when properly following the Order, problems such as 8-2+1 or 6/3/3 leave the solver with multiple answers.

He explains that the order of operations isn’t wrong, per say, just that it’s an inefficient form of problem solving.