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Why Is This Common Core Math Problem So Hard? Supporters Respond To Quiz That Went Viral

Critics say the problem takes a simple one-step subtraction problem and turns it into a complex endeavor with a series of unnecessary steps, including counting by 10s and 100s.

The Hechinger Report asked a couple of the lead writers of the Common Core math standards, Jason Zimba and William McCallum.

Their response? Don’t blame Common Core. Blame a poorly written curriculum.