The Common Core State Standards teach students the algorithm for multi-digit addition and subtraction in 4th grade. But some experts say it should be taught sooner.

Purveyors of the inquiry-based and student-centered math agenda, which has persisted for more than 20 years, argue traditionally taught math has never worked for the vast majority of the nation’s ...

In the CCSS, it’s actually referred to as the “standard algorithm” for addition and subtraction, and the CCSS require that students completely master it for multi-digit numbers by the end of ...