Вычисли выражения: 6 1/3 - 8

- a) $6\frac{1}{3} - 8 = \frac{19}{3} - 8 = \frac{19 - 24}{3} = -\frac{5}{3} = -1\frac{2}{3}$ - б) $-2\frac{2}{7} + 4\frac{3}{5} = -\frac{16}{7} + \frac{23}{5} = \frac{-16 \cdot 5 + 23 \cdot 7}{35} = \frac{-80 + 161}{35} = \frac{81}{35} = 2\frac{11}{35}$ - г) $\frac{3}{8} : (-\frac{9}{16}) = \frac{3}{8} \cdot (-\frac{16}{9}) = -\frac{3 \cdot 16}{8 \cdot 9} = -\frac{48}{72} = -\frac{2}{3}$ - д) $\frac{5}{12} \cdot (-6) = -\frac{5 \cdot 6}{12} = -\frac{30}{12} = -\frac{5}{2} = -2.5$ - ж) $\frac{4}{7} \cdot (-49) = -\frac{4 \cdot 49}{7} = -\frac{196}{7} = -28$ - з) $-16 : (-\frac{4}{9}) = 16 \cdot \frac{9}{4} = \frac{16 \cdot 9}{4} = \frac{144}{4} = 36$ **Ответы:** - a) $-1\frac{2}{3}$ - б) $2\frac{11}{35}$ - г) $-\frac{2}{3}$ - д) $-2.5$ - ж) $-28$ - з) $36$