Khan Academy Videos - Variables and Expressions

-- Variables & Expressions

Below are video lessons and practice problems provided by Khanacademy.org.   

Writing Expressions

 

• What is a Variable?
• Why Aren’t We Using the Multiplication Sign?
• Expression Terms, Factors, and Coefficients
• Practice – Identifying Parts of Expressions
• Writing Expressions 1           
• Practice – Writing Expressions
• Writing Expressions 2
• Practice – Writing Expressions
• Writing Expressions with Variables 1
• Writing Expressions with Variables 2
• Writing Expressions with Variables 3
• Practice – Writing Expressions with Variables Word Problems
• Practice – Writing Expressions with Exponents
• Practice – Writing Expressions with Exponents Word Problems

 

Evaluating Numerical Expressions

 

• Introduction to Order of Operations
• Order of Operations
• Complicated Order of Operations
• Order of Operations with Exponents 1
• Order of Operations with Exponents 2
• Practice – Order of Operations
• Practice – Evaluating Expression with Exponents
• Practice – Evaluating Exponent Expressions Word Problems 

 

Evaluating Expressions with Variables

 

• Evaluating an Expression
• Evaluating a Formula Using Substitution
• Evaluating Expressions with Exponents
• Practice – Evaluating Expressions in One Variable
• Evaluate Expressions in Two Variables
• Practice – Evaluating Expression in Two Variables
• Evaluating Expressions in Word Problems
• Practice – Evaluating Expressions with Variables Word Problems

 

Evaluating Expressions with Variables

 

• Combining Like Terms
• Adding Like Rational Terms
• Combining Like Terms 1
• Combing Like Terms 2
• Equivalent Forms of Expressions
• Practice – Equivalent Forms of Expressions

 

Solving Equations and Inequalities with Substitution

 

• Variables, Expressions, and Equations
• Solving Equations and Inequalities Through Substitution 1
• Solving Equations and Inequalities Through Substitution 2
• Solving Equations and Inequalities Through Substitution 3
• Solving Equations and Inequalities Through Substitution 4
• Practice – Solving Equations and Inequalities Through Substitution

 

Thinking About Solving Equations

 

• Why We Do The Same Thing To Both Sides: Simple Equation
• Representing a Relationship With a Simple Equation
• One Step Equation Intuition
• One Step Equation Introduction
• Practice – One Step Equation Intuition
• Adding and Subtracting the Same Thing From Both Sides
• Intuition Why We Divide Both Sides

 

 Super Yoga Plans

 

• Super Yoga Plans: Basic Variables and Ewquations
• Super Yoga Plans: Solving One-Step Equation
• Practice – Constructing and Solving Equations in the Real World

 

Equations for Beginners

 

• Simple Equations of the Form ax=b
• Solving x/3=14
• Practice One-Step Equations with Multiplication
• Solving x+5=54
• One Step-Equations like ax=b and x+a=b
• Practice – One Step Equations

 

Dependent and Independent Variables

 

• Dependent and Independent Variables 1
• Dependent and Independent Variable 2
• Dependent and Independent Variable 3
• Practice – Dependent and Independent Variables

 

Inequalities

 

• Plotting Inequalities on a Number Line
• Inequalities on a Number Line
• Practice – Inequalities on a Number Line
• Writing Numerical Inequalities
• Practice Numerical Inequalities
• Inequalities in one Variable
• Practice – Inequalities in one Variable