(FOX NEWS) 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.

As schools around the U.S. implement national Common Core learning standards, parents trying to help their kids with math homework say that adding, subtracting, multiplying and dividing has become as complicated as calculus.

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