Students extend numerical patterns involving addition, subtraction, multiplication, division, integers, fractions, and decimals, represent them in tables and simple one-variable algebraic expressions, and describe their rules precisely in words using whole-number term positions. Students identify variables, coefficients, constants, terms, and like terms; translate between verbal phrases and algebraic expressions while preserving operation order, grouping, and meaning. Students combine like terms using whole-number coefficients and evaluate expressions by substituting integers, fractions, or decimals, applying parentheses, operations, and simple whole-number exponents in the correct order.