Expressions and Equations
Apply and extend previous understandings of arithmetic to algebraic expressions.
Apply the properties of operations to generate equivalent expressions. [6-EE3]
Reason about and solve one-variable equations and inequalities.
Understand solving an equation or inequality as a process of answering a question: which values from a specified set, if any, make the equation or inequality true? Use substitution to determine whether a given number in a specified set makes an equation or inequality true. [6-EE5]