1st Grade 1.OA.D.7 Math Operations Algebraic Thinking Printable Worksheet PDF. Common Core State Standard 1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.
1st Grade 1.OA.D.7 Math Operations Algebraic Thinking Printable Worksheet PDF. Common Core State Standard 1.OA.D.7 Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false.