a) [tex]3\frac{1}{2} + 1\frac{3}{4} = 3\frac{2}{4} + 1\frac{3}{4} = 4\frac{5}{4} = 5\frac{1}{4}[/tex]
b) [tex]2\frac{3}{5} - 1\frac{1}{2} = 2\frac{6}{10} - 1\frac{5}{10} = 1\frac{1}{10}[/tex]
c) [tex]6\frac{5}{7} - 1\frac{3}{7} = 6\frac{5}{7} - 1\frac{3}{7} = 5\frac{2}{7}[/tex]
d) [tex]4\frac{3}{9} + 1\frac{5}{9} = 5\frac{8}{9}[/tex]
e) [tex]3\frac{1}{2} - 1\frac{1}{3} = 3\frac{3}{6} - 1\frac{2}{6} = 2\frac{1}{6}[/tex]
f) [tex]\frac{4}{5} + 1\frac{3}{4} = \frac{16}{20} + 1\frac{15}{20} = 1\frac{31}{20} = 2\frac{11}{20}[/tex]
