Domain K.OA, Operations and Algebraic Thinking

Cluster K.OA.A, Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.

Major Cluster

Standard K.OA.A.1

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

32 Lessons

57 Activities

Standard 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.

30 Lessons

33 Activities

Standard K.OA.A.3

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).

26 Lessons

93 Activities

Standard 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.

3 Lessons

19 Activities

Standard K.OA.A.5

Fluently add and subtract within 5.

9 Lessons

32 Activities