This video addresses Common Core Grade 2 Standard Operations & Algebraic Thinking: Represent and solve problems involving addition and subtraction. 03/01/2017 | Rating NR ...

This workbook includes addition and subtraction exercises, poetry lessons, and even “hands-on science experiments” kids and parents can do together. Summer Bridge Activities Book, 1-2 ...

This lively journal is produced five times per year and includes contributions from mathematics practitioners. It reflects the best of current thinking and practice. In addition to articles covering ...

Ellis showed a subtraction problem, performed both using the traditional regrouping, or borrow-and-carry, algorithm and using an example from the common core. Here’s a screenshot of the two methods.

Dutch mathematics programs emphasize mental addition and subtraction in the lower grades. For two-digit numbers up to 100, instruction focuses on "counting by tens from any number" (N10), a strategy ...