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