​What a Common Core Math Problem Really Teaches

7+13=40? Common Core math questions have been critiqued by educators, students, and parents--including Louis CK and Stephen Colbert. But defenders of some tricky math problems argue that they teach skills beyond subtraction and multiplication, as students develop an understanding of “number sense.” Here's a video from Vox that explains how seemingly convoluted Common Core math problems actually teach important concepts.

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