So we took away four. And eureka…5 minus four leaves 1 eye! All made possible by the powerful subtraction symbol.

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 ...

Now that you've learned to do basic math in Excel, your calculations will never slow you down again. With addition, ...