3.OA.D.9 Worksheets - Common Core Math - Education 3.OA.D.9 Worksheets CCSS.MATH.CONTENT.3.OA.D.9 : "Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations." These worksheets can help students practice this Common Core State Standards skill. Worksheets Number Sequences Worksheet Function Tables Worksheet