Вычисли выражения: а) 6 1/8 - 8

Конечно, давай вычислим! а) $6\frac{1}{8} - 8 = \frac{49}{8} - 8 = \frac{49}{8} - \frac{64}{8} = -\frac{15}{8} = -1\frac{7}{8}$ б) $-2\frac{7}{8} + 4\frac{5}{8} = -\frac{23}{8} + \frac{37}{8} = \frac{14}{8} = \frac{7}{4} = 1\frac{3}{4}$ 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) $\frac{8}{9} : (-\frac{8}{16}) = \frac{8}{9} : (-\frac{1}{2}) = \frac{8}{9} * (-2) = -\frac{16}{9} = -1\frac{7}{9}$ д) $12\frac{5}{8} \cdot (-6) = \frac{101}{8} \cdot (-6) = -\frac{606}{8} = -\frac{303}{4} = -75\frac{3}{4}$ е) $-3\frac{2}{9} \cdot 3 = -\frac{29}{9} \cdot 3 = -\frac{29}{3} = -9\frac{2}{3}$ ж) $\frac{4}{7} \cdot (-49) = 4 \cdot (-7) = -28$ и) $-16 : (-\frac{4}{9}) = -16 \cdot (-\frac{9}{4}) = 4 \cdot 9 = 36$ к) $-3\frac{1}{2} \cdot (-1\frac{2}{7}) = -\frac{7}{2} \cdot (-\frac{9}{7}) = \frac{9}{2} = 4\frac{1}{2}$