adding and subtracting 20 videos

Adding and Subtracting Complex Numbers
Algebra 2 Roots and Radicals
How to add and subtract complex numbers.
adding and subtracting complex numbers 
Adding and Subtracting Rational Expressions
Algebra 2 Rational Expressions and Functions
How to add and subtract rational expressions.
rational expressions adding subtracting lcd least common denominator factoring 
Adding and Subtracting
PreAlgebra Whole Numbers
Using the number line to represent adding and subtracting whole numbers

Adding and Subtracting Polynomials
PreAlgebra Polynomials
Adding and subtracting polynomials with pictures or aligning vertically

Adding and Subtracting Polynomials
Algebra Polynomials
How to add or subtract polynomials.
simplify combine like terms 
Adding/Subtracting Fractions Like Denominators
PreAlgebra Fractions and MIxed Numbers
Adding and subtracting fractions that have the same denominator, including a visual representation

Adding/Subtracting Fractions Unlike Denominators
PreAlgebra Fractions and MIxed Numbers
Drawing pictures and procedures for adding or subtracting fractions with unlike denominators

Adding and Subtracting Radical Expressions
Algebra Radical Expressions and Equations
How to add and subtract radical expressions.
square root radical radicand like radicals 
Adding and Subtracting Rational Expression
Algebra Rational Expressions and Functions
How to add or subtract rational expressions.
common denominator excluded value 
Addition and Subtraction with Decimals
PreAlgebra Decimals and Percents
Adding or subtracting decimals by vertically lining up the zeros

Addition and Subtraction with Mixed Numbers
PreAlgebra Fractions 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

Adding Vectors
Precalculus Vectors and Parametric Equations
How to add vectors geometrically two ways.
Displacement Vector Addition Head to Tail Method Parallelogram Method 
Addition and Subtraction
PreAlgebra Integers
Understanding the set of integers in contrast to the whole or natural numbers

Solving and Graphing Inequalities using Addition or Subtraction
Algebra Solving and Graphing Inequalities
How to solve and graph one variable inequalities using addition or subtraction.
inequality notation 
Matrix Operations
Algebra 2 Matrices
How to use simple matrix operations.
adding matrices scalar multiple matrix matrices 
Distributive
PreAlgebra Properties of Numbers
Introduction to the distributive property of multiplication over addition or subtraction

Square Root Operations
Geometry Pythagorean 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
Precalculus Systems 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 
Square Root Operations
Trigonometry Pythagorean Theorem
How to simplify square roots using two different methods.
Pythagorean theorem simplifying square roots adding square roots multiplying square roots rationalizing roots