5 ms·Well, yes, but negative numbers are also well known to every high school math student.by munchler 1mo agoWell, yes, but negative numbers are also well known to every high school math student.Sharlin 1mo agoSure. But "High School Algebra (Excluding Subtraction) Problem" isn’t as catchy a name.brookst 1mo agoThey subtracted the subtraction exclusion in the name of simplicity?