This set of subitizing and addition online activities focuses on the following foundational skills:

• Subitizing Numbers on a Five Frame
• Subitizing Numbers on a Ten Frame
• Adding With Objects, Pictures and Equations (Addition)

Games linked from this page practice Common Core Standards:

• 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.
• 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.
• K.OA.5 – Fluently add and subtract within 5.