Standards

CCSS.Math.Content.K.OA.A

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Operations and Algebraic Thinking

Common Core State Standards (CCSS) Initiative: Mathematics Standards

CCSS.Math.Content.K.OA.A.2 Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.