TERRIFIC Add-Rational-Numbers-Smartboard-Slides-Lesson teaches Same Signs and Different Signs, Finding Additive Inverse, Adding Three or More Rational Numbers, and has a Lesson QUIZ. Includes Word Problems. Adding Fractions, Decimals, and Integers. 29 slides in all! You'll LOVE this lesson and use it year after year! WARNING: You MUST have SMART Technologies SMART software, and a SMARTBOARD to teach from, to effectively download, open and use this Interactive Smartboard Lesson. Go to https://leg