Write, read, and evaluate algebraic expressions. Write expressions that record operations with numbers and variables.

Write, read, and evaluate algebraic expressions. Identify parts of an expression using mathematical terms (sum, term, product, factor, quotient, and coefficient); view one or more parts of an expression as a single entity.

Use variables to represent numbers and write expressions when solving mathematical problems and problems in real-world context; understand that a variable can represent an unknown number or any number in a specified set.