Practice math with beautiful VINTAGE Flash Cards!This version is: High School Math, Algebra 1, Foundations of Algebra, Sets of Numbers, Irrational Numbers, Understanding non-repeating, non-terminating decimals, recognizing examples such as √2 or π 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 questions and answ