Ответ:\(7\frac{5}{9}-2\frac{2}{9}=5\frac{3}{9}=5\frac{1}{3}\).\(5\frac{1}{3}-1\frac{2}{3}=3\frac{2}{3}\).\(6-2\frac{3}{5}=3\frac{2}{5}\).\(4\frac{1}{4}-2\frac{1}{2}=1\frac{3}{4}\).