Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

Conservatives Are Going Ballistic Over This Subtraction Problem Found In A Textbook. By Andy Kiersz. 2014-10-06T18:39:00Z Share. Facebook Email X LinkedIn Copy link. An icon in the shape of ...