[tex]a) \ 1\frac{1}{3}+\frac{4}{5} = 1\frac{5}{15}+\frac{12}{15} = 1\frac{17}{15} =2\frac{2}{15}\\\\\\b) \ 2\frac{5}{7}+1\frac{3}{8} = 2\frac{40}{56}+1\frac{21}{56} = 3\frac{61}{56} = 4\frac{5}{56}\\\\\\c) \ \frac{5}{9}+\frac{5}{6} = \frac{10}{18} + \frac{15}{18} = \frac{25}{18} = 1\frac{7}{18}[/tex]
[tex]d) \ 2\frac{3}{10} + 3\frac{3}{4} = 2\frac{6}{20} + 3\frac{15}{20} =5\frac{21}{20} = 6\frac{1}{20}\\\\\\e) \ 2\frac{4}{5}+\frac{3}{7} = 2\frac{28}{35} + \frac{15}{35} = 2\frac{43}{35} = 3\frac{8}{35}[/tex]
