1st Grade 1.OA.B.3 Math Operations Algebraic Thinking Printable Worksheet PDF. Common Core State Standard 1.OA.B.3 Apply properties of operations as strategies to add and subtract.
1st Grade 1.OA.B.3 Math Operations Algebraic Thinking Printable Worksheet PDF. Common Core State Standard 1.OA.B.3 Apply properties of operations as strategies to add and subtract.