If-Then moves for Solving Inequalities, version 2

Use as an introduction for lesson 14 from Eureka Math (Engage NY) Algebra Module 1. Slides 9-11 are directly from Exercise 1. In this lesson students will learn that the addition and multiplication properties of inequality do not change the solution set of an inequality (unless we multiply by a negative number). In middle school these properties are referred to as if-then moves in this curriculum. Teacher notes are available at http://bit.ly/dabscnotes6

By Shelley Carranza