Expressions & EquationsApply and extend previous understandings of arithmetic to algebraic expressions.2Write, read, and evaluate expressions in which letters stand for numbers.cEvaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving wholenumber exponents, in the conventional order when there are no parentheses to specify a particular order (Order of Operations).
