Вычислите: а) 6 1/3 - 8; б) -2 2/7 + 4 3/5; в) 5 1/3 - 6 1/4; г) 3/8 : (-9/16); д) 5/12 * (-6); е) -3 2/9 * 3; ж) 4/7 * (-49); з) -16 : (-4/9); и) -3 1/2 * (-1 3/7);

а) $6\frac{1}{3} - 8 = \frac{19}{3} - \frac{24}{3} = -\frac{5}{3} = -1\frac{2}{3}$ б) $-2\frac{2}{7} + 4\frac{3}{5} = -\frac{16}{7} + \frac{23}{5} = -\frac{80}{35} + \frac{161}{35} = \frac{81}{35} = 2\frac{11}{35}$ 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) $\frac{3}{8} : (-\frac{9}{16}) = \frac{3}{8} \cdot (-\frac{16}{9}) = -\frac{1 \cdot 2}{1 \cdot 3} = -\frac{2}{3}$ д) $\frac{5}{12} \cdot (-6) = -\frac{5 \cdot 6}{12} = -\frac{5}{2} = -2,5$ е) $-3\frac{2}{9} \cdot 3 = -\frac{29}{9} \cdot 3 = -\frac{29}{3} = -9\frac{2}{3}$ ж) $\frac{4}{7} \cdot (-49) = -\frac{4 \cdot 49}{7} = -4 \cdot 7 = -28$ з) $-16 : (-\frac{4}{9}) = -16 \cdot (-\frac{9}{4}) = 4 \cdot 9 = 36$ и) $-3\frac{1}{2} \cdot (-1\frac{3}{7}) = -\frac{7}{2} \cdot (-\frac{10}{7}) = \frac{10}{2} = 5$