Students identify, represent, locate, and interpret proper, improper, and mixed numbers using area models, sets, number lines, and benchmark fractions, and recognize, generate, convert, and simplify equivalent fractions. Students compare and order positive fractions and mixed numbers with common or unlike denominators using equivalent fractions, common numerators or denominators, benchmarks, and number-line reasoning. Students add and subtract fractions and mixed numbers with like denominators, including regrouping, and solve contextual problems involving unlike-denominator addition and subtraction, finding a fraction of a quantity, and division situations with a whole number and a unit fraction.