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.