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.

Represent teen numbers with addition and subtraction equations involving one 10. Represent 10 using a number bond and 10-frame with a missing addend. Use Notice and Wonder with a 10-frame ...

During the World Business Forum this week in New York City, McNeill presented insights into building innovative companies, a method Tesla CEO Elon Musk calls “the algorithm.” This approach ...

Algorithms have become integral ... He provided the first detailed explanations for using decimal notation to perform the four basic operations (addition, subtraction, multiplication, division ...