Practice simplifying fractions in this math memory game for children in 2nd, 3rd, 4th, 5th and 6th grades. Math memory interactive online fun game. This game is an interactive online test for children to practice their skills on how to simplify fractions. Each game has multiple choice answers to problems. These games are suitable homeschool and classroom practice for children in 2nd, 3rd, 4th, 5th, 6th and 7th grades. Click start and begin practicing.