AA++ Lesson! Subtract Rational-Numbers Fractions-Decimals-Integers Smartboard-Slides-Lesson teaches Subtracting Positive and Negative Rational Numbers, Adding Opposite, Finding Distance between two numbers, QUIZ, Independent Practice and Answer Key too. You'll love using this 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://legacy.smarttech.com/en/prod