[tex]a) \: \frac{5}{8} + \frac{7}{8} + \frac{3}{8} = \frac{15}{8} = 1 \frac{7}{8} [/tex]
[tex] \frac{3}{4} - \frac{1}{4} = \frac{2}{4} = \frac{1}{2} [/tex]
[tex]b) \: 2 - \frac{2}{3} = 1 \frac{1}{3} [/tex]
[tex]2 \frac{1}{4} - 1 \frac{3}{4} = \frac{2}{4} [/tex]
[tex]c) \: 1 \frac{1}{5} + \frac{2}{5 } - \frac{4}{5} = 1 \frac{3}{5} - \frac{4}{5} = \frac{4}{5} [/tex]
[tex]2 \frac{5}{6} + 1 \frac{1}{6} - \frac{3}{6} = 4 - \frac{3}{6} = 3 \frac{3}{6} = 3 \frac{1}{2} [/tex]
