Kindergarten Operations and Algebraic Thinking


Forming sets and adding and subtracting objects. Just click on the blue links to display or print pdfs.  
Standards

Practice
Pages


Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from  Cluster 1 

Standard K.OA.1: Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g. claps,) acting out situations, verbal explanations, expressions, or equations.  Count Sets of Dogs Answers K.OA.1.a 
Takeaway Dogs Answers K.OA.1.b 
Standard K.OA.2: Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.  Add Word Problems Answers K.OA.2.a 
Add/Subtract Answers K.OA.2.b 
Standard K.OA.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).  Break Down Shapes Answers K.OA.3.a 
Draw X 3 Answers K.OA.3.b 
Standard
K.OA.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. 
Find Number Answers K.OA.4.a 
Use Subtraction 2 Answers K.OA.4.b 
Standard K.OA.5: Fluently add and subtract within 5.  Count Shapes Answers K.OA.5.a 
Subtract Numbers Answers K.OA.5.b 