In this pre-algebra lesson, Mr. Perez explains the concepts of additive inverse and absolute value of a number. He demonstrates how to calculate the opposite or additive inverse of a number by multiplying it by negative one and how to find the absolute value by calculating the distance from zero on the number line. He also shows how to evaluate expressions involving absolute values and compares them to determine if they are true or false.
A tutorial on opposites and absolute values of numbers.
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.
Questions answered by this video:
What is the absolute value of a number?
What is the opposite of a number?
How is absolute value like distance?
How do you find the absolute value of an expression?
How can you find absolute values and opposites using the number line?
What is an additive inverse?
What is the opposite or additive inverse of -6?
What is the absolute value of -8?
Is |-6| <= -(-6)?
Is 4 - |-6| < -2 - (-5)?
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In this video, you will learn all about opposites of numbers and absolute value of numbers. These concepts are explained using a number line. Several examples are shown in this video, and Professor Perez explains the concept very well.