Grade 1
Domain Operations and Algebraic Thinking
Cluster Work with addition and subtraction equations.
Standard Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. <span class='clarification'>For example, which of the following equations are true and which are false? $6 = 6$, $7 = 8 - 1$, $5 + 2 = 2 + 5$, $4 + 1 = 5 + 2$.</span>

1.OA.D.7. Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? $6 = 6$, $7 = 8 - 1$, $5 + 2 = 2 + 5$, $4 + 1 = 5 + 2$.