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 ...
Addition and subtraction with regrouping using different strategies to solve. In this lesson, students go over addition and subtraction with regrouping using different strategies to solve. Today we ...
The Common Core State Standards for mathematics, now being introduced in schools across the country, set new grade-by-grade expectations for deepening students’ understanding of math concepts, with an ...
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