Question

пж сделайте срочнл пж пж​

Answer 1

Ответ:

1)

a)  $\frac{3}{7}*\frac{4}{5} = \frac{12}{35}$

б) $\frac{5}{9} * \frac{2}{5} = \frac{2}{9}$

в)$\frac{6}{7} * \frac{21}{22} = \frac{3*3}{11} = \frac{9}{11}$

г)$(\frac{3}{4})^3 = \frac{3*3*3}{4*4*4} = \frac{27}{64}$

д)$\frac{3}{5} : \frac{4}{7} = \frac{3}{5} * \frac{7}{4} = \frac{21}{20} = 1\frac{1}{20} = 1.05$

е)$\frac{25}{24} : \frac{15}{16} = \frac{25}{24} * \frac{16}{15} = \frac{5*5*4*4}{4*6*5*3} = \frac{10}{9} = 1\frac{1}{9}$

ж)$\frac{6}{7} : 3 = \frac{6}{21} = \frac{2}{7}$

з) $8:\frac{4}{5} = 8*\frac{5}{4} =2*5 = 10$

2)

а)

$\frac{4}{5}*(\frac{15}{16}:\frac{3}{4}) = \frac{4}{5}*(\frac{15}{16}*\frac{4}{3}) = \frac{4}{5}*\frac{5}{4} = 1$

б) $\frac{15}{23}: \frac{5}{6} *\frac{23}{24} = \frac{15}{23}* \frac{6}{5} *\frac{23}{24} = \frac{5*3*6*23}{23*5*6*4} = \frac{3}{4} = 0.75$

в) $\frac{3}{4} *\frac{4}{5}* \frac{5}{6} *\frac{6}{7} = \frac{3*4*5*6}{4*5*6*7} = \frac{3}{7}$