Operations and Algebraic Thinking (OA)

Click on the pictures below each Common Core Standard for websites and songs for practicing math skills.

OA.1: Use addition and subtraction within 20 to solve word problems

OA.3: Apply properties of operations as strategies to add and subtract

OA.4: Understand subtraction as an unknown addend problem

OA.5: Relate counting to addition and subtraction

OA.6: Add and subtract within 20, show fluency for adding and subtracting within 10

OA.7: Understand the meaning of the equal sign

OA.8: Determine the unknown number in an addition or subtraction equation