18 videos in "Evaluating Expressions"

Expressions & Formulas

Variables, Expressions, and Equations

Addition and Subtraction

Multiplication and Division

Operations and Expressions

Evaluating mathematical expressions

Evaluating an expression

Evaluating Expressions with Three Variables

Evaluate Expression for Two Variables

What is an Algebraic Expression

What is a Variable

Equivalent Expressions

Simplifying Expressions with Addition and Subtraction

Simplifying Expressions with Subtraction and Multiplication

Simplifying Expressions with Division

Simplifying Expressions with Division

Simplify Numerator and Denominator of Expressions

Simplifying Basic Expressions
Multiplication and Division
Multiplication and Division
5445 views, 2 ratings  00:08:18
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.
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Multiplication and division are explained using a number line. Also, many examples of multiplying and dividing fractions with negative signs. Also, multiplying and dividing by 0 is discussed.
 How do you multiply and divide integers using a number line?
 Why does a negative number times a negative number equal a positive number?
 What does any number times 0 equal?
 What are reciprocals and what do reciprocals equal when they are multiplied?
 How do you multiply fractions by canceling out common factors?
 What does 3(5/6)(2/3) equal?
 How do you divide fractions?
 What does 6/(5/7) equal?
 What is 0/5?
 What happens when you divide by 0?
 Why can't you divide by 0?
 What is 0 divided by 0?
This lesson explains the concept of multiplication and division using a number line. Reciprocals are revisited, fractions are multiplied and divided, and several example problems are shown for simplifying expressions with multiplication and division and using negative signs.
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