[tex]\frac{4}{1} + \frac{3}{5} = \frac{20}{5} + \frac{3}{5} = \frac{23}{5} = 4 \frac{3}{5}\\\\\2\frac{3}{8} + 1\frac{5}{6} = \frac{19}{8} + \frac{11}{6} = \frac{57}{24} + \frac{44}{24} = \frac{101}{24} = 4\frac{5}{24}\\\\\frac{5}{9} -\frac{2}{5} = \frac{25}{45} - \frac{18}{45} = \frac{7}{45} \\\\3\frac{2}{3} - 1\frac{3}{6} = \frac{11}{3} - \frac{9}{6} = \frac{22}{6} -\frac{9}{6} = \frac{13}{6} = 2\frac{1}{6}[/tex]
