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.4 For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.