Savvas Envision Math Answer Key EnVision Math Answer Key - EnVision Math Answer Key For Grade 8, 7, 6 ... enVision Math Common Core Grade 7 Answer Key. Topic 1 Rational Number Operations. Topic 2 Analyze and Use Proportional Relationships. Topic 3 Analyze and Solve Percent Problems. Topic 4 Generate Equivalent Expressions. Topic 5 Solve Problems Using Equations and Inequalities.