Counting methods -- The language of sets -- Natural numbers and integers -- Addition and subtraction -- Multiplication and division -- Fractions built of integers -- Decimal fractions -- Powers and roots -- Irrational and real numbers -- Review questions and answers -- Equations and inequalities -- First-degree equations one variable -- Mapping, relations, and functions -- The Cartesian plane -- Graphs of linear relations -- Two-by-two linear systems -- Two-by-two linear graphs -- Larger linear systems -- The matrix morphing game -- Imaginary and complex numbers -- Quadratic equations with real roots -- Quadratic equation with complex roots -- Graphs of quadratic functions -- Cubic equations in real numbers -- Polynomial equations in real numbers -- More two-by-two systems -- More two-by-two graphs -- Logarithms and exponentials

1. Algebra