How Common Core subtraction works

The Common Core method has many parents concerned. Complaints range from "it's too focused on understanding the steps instead of getting the right answer" to "it's too complicated, I can't even help my kids with their homework."

But the way math was taught before Common Core was not always the only way. When the so-called "New Math" was introduced in the 1960s it was met with much of the same criticism Common Core is facing today.

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