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 ...

The present paper describes the success, the methods (mental, informal written, standard algorithm) and the strategies of informal written arithmetic to be observed when 300 elementary students worked ...

The Numerical Mathematics Consortium today announced the latest revision to a technical specification introduced earlier this year that defines an open mathematics semantics standard for numerical ...

Students put all of their addition and subtraction skills together to solve equations.