The common-core math standards require that students learn the standard algorithm for multi-digit adding and subtracting—you know, the process in which you line the numbers up vertically to add or ...

Ever wanted to impress everyone by solving complex multiplication problems in your head, without needing a pencil or paper? It's not magic; it's mental math—a superpower you can learn! This article is ...

The Common Core's approach to math has proved among the most contentious aspects of the controversial national teaching standards. In short, the new methods for addition and multiplication — namely, ...

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