Вычисли значения выражений под буквами а, б, в, г, д, ж, з, и, к.

a) $6 \frac{1}{3} - 8 = \frac{19}{3} - 8 = \frac{19}{3} - \frac{24}{3} = -\frac{5}{3} = -1 \frac{2}{3}$. б) $-2 \frac{7}{5} + 4 \frac{1}{3} = -\frac{17}{5} + \frac{13}{3} = -\frac{51}{15} + \frac{65}{15} = \frac{14}{15}$. в) $5 \frac{1}{3} - 6 \frac{1}{4} = \frac{16}{3} - \frac{25}{4} = \frac{64}{12} - \frac{75}{12} = -\frac{11}{12}$. г) $3 \frac{8}{9} : ( -6 \frac{1}{12} ) = \frac{35}{9} : ( - \frac{73}{12} ) = \frac{35}{9} \cdot ( - \frac{12}{73} ) = - \frac{35 \cdot 12}{9 \cdot 73} = - \frac{5 \cdot 4}{3 \cdot 73} = - \frac{20}{219}$. д) $3 \frac{8}{16} : ( - \frac{9}{11} ) = 3 \frac{1}{2} : ( - \frac{9}{11} ) = \frac{7}{2} : ( - \frac{9}{11} ) = \frac{7}{2} \cdot ( - \frac{11}{9} ) = - \frac{7 \cdot 11}{2 \cdot 9} = - \frac{77}{18} = -4 \frac{5}{18}$. ж) $\frac{4}{7} \cdot ( -49 ) = - \frac{4 \cdot 49}{7} = - 4 \cdot 7 = -28$. з) $-16 : ( - \frac{4}{9} ) = 16 \cdot \frac{9}{4} = \frac{16 \cdot 9}{4} = 4 \cdot 9 = 36$. и) $-3 \frac{2}{9} : 3 = - \frac{29}{9} : 3 = - \frac{29}{9} \cdot \frac{1}{3} = - \frac{29}{27} = -1 \frac{2}{27}$. к) $-3 \frac{1}{2} \cdot ( -1 \frac{3}{7} ) = - \frac{7}{2} \cdot ( - \frac{10}{7} ) = \frac{7 \cdot 10}{2 \cdot 7} = \frac{10}{2} = 5$. *Перевод:* a) $6 \frac{1}{3} - 8 = -1 \frac{2}{3}$. б) $-2 \frac{7}{5} + 4 \frac{1}{3} = \frac{14}{15}$. в) $5 \frac{1}{3} - 6 \frac{1}{4} = -\frac{11}{12}$. г) $3 \frac{8}{9} : ( -6 \frac{1}{12} ) = - \frac{20}{219}$. д) $3 \frac{8}{16} : ( - \frac{9}{11} ) = -4 \frac{5}{18}$. ж) $\frac{4}{7} \cdot ( -49 ) = -28$. з) $-16 : ( - \frac{4}{9} ) = 36$. и) $-3 \frac{2}{9} : 3 = -1 \frac{2}{27}$. к) $-3 \frac{1}{2} \cdot ( -1 \frac{3}{7} ) = 5$.