Grade 1 · Operations and Algebraic Thinking

CCSS.MATH.CONTENT.1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Read this standard on the official Common Core site

Lessons that teach this standard

• Addition and Subtraction Stories Within 20

  First grade word problems: add to, take from, put together, take apart and compare within 20, with the unknown in any spot, plus stories that add three numbers.