[tex]a) \frac{1}{6} +\frac{2}{5} =\frac{5}{30} +\frac{12}{30} =\frac{17}{30}\\\\ b)\frac{8}{9} -\frac{5}{6} =\frac{48}{54} -\frac{45}{54} =\frac{3}{54} =\frac{1}{18} \\\\c)1\frac{1}{5} +8\frac{1}{7} =\frac{6}{5}+\frac{57}{7} =\frac{42}{35} +\frac{285}{35} =\frac{327}{35} =9\frac{12}{35} \\\\d)4\frac{7}{10} -2\frac{1}{3} =\frac{47}{10} -\frac{7}{3} =\frac{141}{30} -\frac{70}{30} =\frac{71}{30} =2\frac{11}{30} \\\\[/tex]
[tex]e)4\frac{1}{5} -\frac{7}{10} =\frac{21}{5} -\frac{7}{10} =\frac{42}{10} -\frac{7}{10} =\frac{35}{10} =3\frac{5}{10} =3\frac{1}{2} \\\\f)6\frac{1}{8} -2\frac{3}{4} =\frac{49}{8}-\frac{11}{4} =\frac{49}{8}-\frac{22}{8}=\frac{27}{8} =3\frac{3}{8} \\\\g)10\frac{2}{3} -6\frac{7}{9} =\frac{32}{3} -\frac{61}{9} =\frac{96}{9} -\frac{61}{9}=\frac{35}{9} =3\frac{8}{9} \\\\h)9\frac{3}{8} -2\frac{5}{6} =\frac{75}{8} -\frac{17}{6} =\frac{450}{48} -\frac{136}{48}=\frac{314}{48} =6\frac{26}{48} =6\frac{13}{24}[/tex]
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