There's a reason why you're forced to show your work in math class. It's important that you can prove how you reached a conclusion to show that you comprehend the reasoning and aren't just blindly following the rule. Unfortunately, the same requirement is not translated well—or consistently—from the classroom to the workplace, with too many managers blindly following rules that they don't understand to the point of sociopathic cruelty. This issue also isn't helped by the fact that there are a l…