New York State Learning Standards and Core Curriculum
NY-6.EE. Expressions, Equations and Inequalities
Apply and extend previous understandings of arithmetic to algebraic expressions.
NY-6.EE.2. Write, read, and evaluate expressions in which letters stand for numbers.
NY-6.EE.2c. Evaluate expressions given specific values for their variables. Include expressions that arise from formulas in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order. (Order of Operations).
NY-6.EE.3. Apply the properties of operations to generate equivalent expressions.