ПОМОГИТЕ ПЛЗ ОЧЕНЬ НАДО ДО СЕГОДНЯ ПРЯМ ОЧЕНЬ ПРИ ОЧЕНЬ!

1) $(\frac{2}{7} + \frac{5}{21}) : 1 \frac{4}{7} = \frac{11}{21} : \frac{11}{7} = \frac{11}{27} * \frac{7}{11} = \frac{1}{3}$

2) $(\frac{8}{11} + \frac{3}{22}) : \frac{5}{11} = \frac{19}{22} * \frac{11}{5} = \frac{19}{2} * \frac{1}{5} = \frac{19}{10}$

3) $1 \frac{7}{12} : (\frac{3}{8} + \frac{5}{12}) =\frac{19}{12} : \frac{19}{24} = \frac{19}{12} * \frac{24}{19} = 2$

4) $\frac{17}{36} : (\frac{7}{12}- \frac{5}{9} )= \frac{17}{36}: \frac{1}{36} = \frac{17}{36}* 36=17$

5) $(\frac{3}{14} + \frac{5}{7} ) : 3 \frac{5}{7} = \frac{13}{14} : \frac{26}{7} = \frac{13}{14} * \frac{7}{26} = \frac{1}{2} * \frac{1}{2} = \frac{1}{4}$

6) $\frac{19}{24}: (\frac{3}{16} + \frac{5}{24}) = \frac{19}{24}: \frac{19}{48} = \frac{19}{24}* \frac{48}{19} = 2$