• #### Adding and Subtracting Complex Numbers

How to add and subtract complex numbers.

##### Pre-AlgebraWhole Numbers

Using the number line to represent adding and subtracting whole numbers

• #### Adding and Subtracting Polynomials

##### Pre-AlgebraPolynomials

Adding and subtracting polynomials with pictures or aligning vertically

• #### Adding and Subtracting Rational Expressions

##### Algebra 2Rational Expressions and Functions

How to add and subtract rational expressions.

rational expressions adding subtracting lcd least common denominator factoring
• #### Adding/Subtracting Fractions- Like Denominators

##### Pre-AlgebraFractions and MIxed Numbers

Adding and subtracting fractions that have the same denominator, including a visual representation

• #### Adding/Subtracting Fractions- Unlike Denominators

##### Pre-AlgebraFractions and MIxed Numbers

Drawing pictures and procedures for adding or subtracting fractions with unlike denominators

##### PrecalculusVectors and Parametric Equations

How to add vectors geometrically two ways.

• #### Adding and Subtracting Polynomials

##### AlgebraPolynomials

How to add or subtract polynomials.

simplify combine like terms

• #### Adding and Subtracting Rational Expression

##### AlgebraRational Expressions and Functions

How to add or subtract rational expressions.

common denominator excluded value
• #### Addition and Subtraction with Decimals

Adding or subtracting decimals by vertically lining up the zeros

• #### Matrix Operations

##### Algebra 2Matrices

How to use simple matrix operations.

adding matrices scalar multiple matrix matrices
• #### Addition and Subtraction with Mixed Numbers

##### Pre-AlgebraFractions and MIxed Numbers

Adding or subtracting mixed numbers by either converting them to improper fractions or working with the integer part and the fractional part separately

• #### Square Root Operations

##### GeometryPythagorean Theorem

How to simplify square roots using two different methods.

Pythagorean theorem simplifying square roots adding square roots multiplying square roots rationalizing roots
• #### Square Root Operations

##### TrigonometryPythagorean Theorem

How to simplify square roots using two different methods.

Pythagorean theorem simplifying square roots adding square roots multiplying square roots rationalizing roots
• #### Simplifying Determinants

##### PrecalculusSystems of Linear Equations and Matrices

How to simplify determinants using three row (or column) operations.

determinant row operations column operations interchanging rows common factors adding a multiple of one row to another