[tex]a)\\\\ - \frac{3}{4}+ (-8 \frac{5}{8}) + (-6 \frac{5}{6})+ (-1 \frac{3}{8})= - \frac{3}{4} -8 \frac{5}{8} -6 \frac{5}{6} -1 \frac{3}{8}= - \frac{18}{24} -8 \frac{15}{24} -6 \frac{20}{24} -1 \frac{9}{24}=\\\\=-15\frac{62}{24}=-15\frac{31}{12}=-17\frac{7}{12}\\\\b)\\\\-14 \frac{1}{2} + (-7 \frac{3}{5} ) + 8 \frac{1}{5} + (-6,3)=-14 \frac{5}{10} -7 \frac{6}{10} + 8 \frac{2}{10} -6\frac{3}{10} =-19\frac{12}{10} =\\\\=-19\frac{6}{5}=-20\frac{1}{5}[/tex]
[tex]c)\\\\ 20 + (-16,3) + 4 \frac{1}{3} + (-18 \frac{2}{3}) = 20 -16 \frac{3}{10} + 4 \frac{1}{3} - 18 \frac{2}{3}= 20 -16 \frac{9}{30} + 4 \frac{10}{30} - 18 \frac{20}{30}=\\\\=24\frac{10}{30}-34\frac{29}{30} =-10\frac{16}{30}[/tex]
[tex]d)\\\\ -0,6 + 2 \frac{3}{8} + (-7 \frac{5}{8}) + (- \frac{1}{2}) + 0=- \frac{6 }{10}+ 2 \frac{3}{8} -7 \frac{5}{8} - \frac{1}{2}=- \frac{24 }{40}+ 2 \frac{15}{40} -7 \frac{25}{40} - \frac{20}{40}=\\\\=-7\frac{69}{40}+2\frac{15}{40}=-5\frac{54}{40}=-6\frac{14}{40}=-6\frac{7}{20}[/tex]
