4.298 Выполните действия: 1) \frac{3}{8} + \frac{21}{21} : \frac{7}{22} - \frac{66}{8} : 0,4 - 19,36 ; 2) \frac{(15 - 9^2)}{\frac{2}{3}} : \frac{(19 \frac{2}{3} - 11 \frac{7}{9})}{\frac{9}{71}}

1) \frac{3}{8} + \frac{21}{21} : \frac{7}{22} - \frac{66}{8} : 0,4 - 19,36 = = \frac{3}{8} + 1 : \frac{7}{22} - \frac{33}{4} : \frac{2}{5} - 19,36 = = \frac{3}{8} + \frac{22}{7} - \frac{33}{4} * \frac{5}{2} - 19,36 = = \frac{3}{8} + \frac{22}{7} - \frac{165}{8} - 19,36 = = \frac{21 + 176 - 1155}{56} - 19,36 = \frac{-958}{56} - 19,36 = -17,107 - 19,36 = -36,467 2) \frac{(15 - 9^2)}{\frac{2}{3}} : \frac{(19 \frac{2}{3} - 11 \frac{7}{9})}{\frac{9}{71}} = = \frac{(15 - 81)}{\frac{2}{3}} : \frac{(\frac{59}{3} - \frac{106}{9})}{\frac{9}{71}} = = \frac{-66}{\frac{2}{3}} : \frac{(\frac{177-106}{9})}{\frac{9}{71}} = = -66 * \frac{3}{2} : \frac{\frac{71}{9}}{\frac{9}{71}} = = -33 * 3 : \frac{71}{9} * \frac{71}{9} = = -99 : \frac{5041}{81} = -99 * \frac{81}{5041} = -\frac{8019}{5041} = -1,59