# Introductory Algebra Lessons

Add and Subtract Fractions: Different Denominators

Add and Subtract Fractions: Same Denominator

Add and Subtract Numbers using the Number Line

Algebraic Expressions: Worked Examples

Divisibility Rules for 2, 3, 4, 5, 6, 9, and 10

Finding All Factors of a Number using the Rainbow Method

Function: Notation and Evaluation

Linear Equations: Solving One-Step Equations

List of All Factors of Numbers from 1 to 100

List of All Factors of Numbers from 101 to 200

List of All Factors of Numbers from 201 to 300

List of All Factors of Numbers from 301 to 400

List of All Factors of Numbers from 401 to 500

List of All Factors of Numbers from 501 to 600

List of All Factors of Numbers from 601 to 700

List of All Factors of Numbers from 701 to 800

List of All Factors of Numbers from 801 to 900

List of All Factors of Numbers from 901 to 1,000

List of Multiples of Numbers from 1 to 100 (First Ten Multiples)

List of Prime Numbers up to 10,000

Multiply and Divide Positive/Negative Numbers

Order of Operations: Practice Problems

Plotting Points on a Graph or XY-plane

Prime Factorization of an Integer

Prime Factorization of Numbers 2 to 100

Product of GCF and LCM of Two Positive Integers

Scientific Notation: How to Write

The Properties of Real Numbers