Вычислите:
а) $15\frac{7}{24} : 3\frac{7}{120}$;
б) $(-20\frac{1}{4}) * 20\frac{5}{9}$;
в) $2\frac{3}{5} : 1\frac{11}{15}$;
г) $3\frac{1}{5} : (-9\frac{3}{5})$;
д) $11\frac{7}{13} * 1\frac{23}{55}$;
е) $4\frac{22}{55} * (-3\frac{17}{27})$.
$15\frac{7}{24} : 3\frac{7}{120} = \frac{367}{24} : \frac{367}{120} = \frac{367}{24} * \frac{120}{367} = \frac{1}{1} * \frac{5}{1} = 5$
$(-20\frac{1}{4}) * 20\frac{5}{9} = -\frac{81}{4} * \frac{185}{9} = -\frac{9}{4} * \frac{185}{1} = -\frac{1665}{4} = -416\frac{1}{4}$
$2\frac{3}{5} : 1\frac{11}{15} = \frac{13}{5} : \frac{26}{15} = \frac{13}{5} * \frac{15}{26} = \frac{1}{1} * \frac{3}{2} = 1\frac{1}{2}$
$3\frac{1}{5} : (-9\frac{3}{5}) = \frac{16}{5} : (-\frac{48}{5}) = \frac{16}{5} * (-\frac{5}{48}) = \frac{1}{1} * (-\frac{1}{3}) = -\frac{1}{3}$
$11\frac{7}{13} * 1\frac{23}{55} = \frac{150}{13} * \frac{78}{55} = \frac{30}{1} * \frac{6}{11} = \frac{180}{11} = 16\frac{4}{11}$
$4\frac{22}{55} * (-3\frac{17}{27}) = 4\frac{2}{5} * (-\frac{98}{27}) = \frac{22}{5} * (-\frac{98}{27}) = -\frac{2156}{135} = -15\frac{131}{135}$
Пожауйста, оцените решение