Grade 2 · Operations and Algebraic Thinking

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

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using 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

• Word Problems Within 100: One and Two Steps

  Second grade word problems: add and subtract within 100 to solve one-step and two-step problems, using tape diagrams and number sentences with a box for the unknown.