This document provides a lesson on solving one-step inequalities involving multiplication and division. It begins with examples of multiplying and dividing inequalities by negative numbers. Students are asked to determine if the inequality sign changes when multiplying or dividing by a negative number. The lesson then works through examples of solving various one-step inequalities involving multiplication and division. Real-world word problems are also presented and students are asked to write and solve the inequalities to find maximum or minimum values.