Are you looking for math resources to assessment student Common Core performance? This resource contains 10 questions to assess understanding of Common Core Standard 4.OA.A.2. An answer key is also included.
Use this as a pretest or as a posttest. This is a great resource for Common Core.
Click Here To Access 4.OA.A.1 Common Core Assessment
Click Here To Access 4.OA.A.3 Common Core Assessment