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Kindergarten · Math · Domain guide

Operations & Algebraic Thinking in Kindergarten (K.OA)K.OA Standards

Short answer. Don't let the word algebraic scare you. In kindergarten it means your child learns what adding and taking away actually feel like: putting two groups of blocks together, eating 2 of 5 cookies and seeing 3 left, clapping out a sum. The K.OA standards keep everything within 10 and lean on fingers, objects, drawings, and acting things out rather than worksheets full of bare equations.

By spring, most kindergarteners can solve simple word problems, break a number apart in more than one way (5 = 2 + 3 and 5 = 4 + 1), find the partner that makes 10, and add and subtract within 5 without counting everything from scratch. All five standards live in a single cluster, K.OA.A, which frames addition as putting together and subtraction as taking apart or taking from.

Grade
Kindergarten
Learning level
Subject
Math
Skill area
Standards
5
Skills in this domain
Clusters
1
Related skill groups

Complete domain directory

Every K.OA standard, in order

Open a code for the official wording, a plain-English answer, what the skill can look like at home, and simple activities. The list below follows the Common Core sequence.

01
Cluster

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

5 standards

  1. K.OA.A.1Show Addition and Subtraction Many Ways (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.

  2. K.OA.A.2Add and Subtract Word Problems Within 10 (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.

  3. K.OA.A.3Break Numbers Apart in More Than One Way (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).

  4. K.OA.A.4Find the Number That Makes 10 (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.

  5. K.OA.A.5Add and Subtract Within 5, Fluently (K.OA.A.5)

    Fluently add and subtract within 5.

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More than a standards list

Use the framework guide for context, the learning hub for explanations, or printable practice when your child is ready to work on a skill.

K.OA is part of the Common Core State Standards. Whizki keeps official wording separate from parent-friendly explanations.

All Common Core parent guides

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