An Iowa woman jokingly calls it "Satan's handiwork.'' A California mom says she's broken down in tears. A Pennsylvania parent says it "makes my blood boil.'' What could be so horrible? Grade-school ...

Math can be fun, but it can also be tricky. Adding, subtracting, multiplying and dividing — numbers can really boggle the mind sometimes. And really, this is true at any age, with a lot of opinions ...