Practice subtraction of fractions horizontally arranged in this En garde math game for 2nd, 3rd, 4th & 5th grades. Math En garde interactive online fun game. This game is an interactive online test for children to practice their skills on subtracting 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.