Teaching in Room 9. Add/Subtract With Regrouping 4 | 2nd Grade Math. Special | 29m 6s Video has Closed Captions | CC. Addition & subtraction with regrouping using different strategies to solve.

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.