1.OA.7

=Operations and Algebraic Thinking=

1.OA.7 - Understand the meaning of the equal sigh, 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.
 * Work with addition and subtraction equations**