3rd Grade Math Assessment. This assessment covers the Core Standard for Operations and Algebraic Thinking and includes Measurement & Data 7 which is finding area using multiplication and addition. This is a great pre/post assessment for your students to show what they know about multiplication, division, area, and arrays. Students will read word problems, write equations, and draw models in this assessment. OA.1, OA.2 OA.3, OA.4, OA.5, OA.6, OA.7, and MD.7 a, c, and d are assessed in this te