### Understand addition, and understand subtraction.

**Represent addition and subtraction with objects, fingers, mental images, drawings ^{1}, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.**

**Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.**

**Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).**

**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.**

**Fluently add and subtract within 5.**