Teaching in Room 9 Addition and Subtraction All Together 2 | 2nd Grade Math Special | 29m 51s | CC In this lesson, students put all of their addition and subtraction skills together to solve ...

Under the common core, there are many ways to do subtraction—none of which involve borrowing and carrying.

The Common Core State Standards suggest several strategies for teaching early addition and subtraction, including one called “making ten.” That strategy—which I used as a teacher myself ...

A learning/teaching approach used base-ten blocks to embody the English named-value system of number words and digit cards to embody the positional base-ten system of numeration. Steps in addition and ...

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