This is rapidly becoming an epidemic. A child is assigned a math problem to be solved using the enigmatic methods taught in schools that are using the Common Core Curriculum Standards. Then a sane adult who learned math the conventional way weighs in. Oftentimes that adult holds a doctorate.
Here is the latest.
David Freddoso, who shared the problem, tweets:
Is this real? If so, is it Common Core or a bad textbook? MT @eli_mari78: pic.twitter.com/eKom3Ahj3N
— David Freddoso (@freddoso) March 20, 2014