Practice math with beautiful VINTAGE Flash Cards!This version is: High School Math, Algebra 1, Rational Expressions & Equations, Simplifying Rational Expressions, Restrictions on Rational Expressions, Identifying values that make denominators zero and excluding them These vintage flash cards include 25 questions with answers on the back. They are ready to print and cut, and come in three printable versions: Full Color, Black & White, and Plain. Editable versions of each are also included, so the