Вычисли значения выражений в задании 19

- a) $6\frac{1}{3} - 8 = \frac{19}{3} - 8 = \frac{19 - 24}{3} = -\frac{5}{3} = -1\frac{2}{3}$ - б) $-2\frac{2}{7} + 4\frac{3}{5} = -\frac{16}{7} + \frac{23}{5} = \frac{-16*5 + 23*7}{35} = \frac{-80 + 161}{35} = \frac{81}{35} = 2\frac{11}{35}$ - в) $5\frac{1}{3} - 6\frac{1}{4} = \frac{16}{3} - \frac{25}{4} = \frac{16*4 - 25*3}{12} = \frac{64 - 75}{12} = -\frac{11}{12}$ - г) $3\frac{3}{8} : (-\frac{9}{16}) = \frac{27}{8} * (-\frac{16}{9}) = -\frac{27*16}{8*9} = -\frac{3*2}{1*1} = -6$ - д) $\frac{5}{12} * (-6) = \frac{5*(-6)}{12} = \frac{5*(-1)}{2} = -\frac{5}{2} = -2.5$ - e) $-3\frac{2}{9} * 3 = -\frac{29}{9} * 3 = -\frac{29}{3} = -9\frac{2}{3}$ - ж) $\frac{4}{7} * (-49) = 4*(-7) = -28$ - з) $-16 : (-\frac{4}{9}) = 16 * \frac{9}{4} = 4 * 9 = 36$ - и) $-3\frac{1}{2} * (-1\frac{3}{7}) = -\frac{7}{2} * -\frac{10}{7} = \frac{1}{1} * \frac{5}{1} = 5$ **Ответы:** - a) $-1\frac{2}{3}$ - б) $2\frac{11}{35}$ - в) $-\frac{11}{12}$ - г) $-6$ - д) $-2.5$ - e) $-9\frac{2}{3}$ - ж) $-28$ - з) $36$ - и) $5$