Question

Пж решите дам 40 балов !

Answer 1

$\displaystyle 1)\frac{5}{7}(\frac{21}{20}-\frac{7}{30})+\frac{16}{21}:\frac{8}{7}=\frac{5}{7}*\frac{49}{60}+\frac{16}{21}*\frac{7}{8}=\frac{7}{12}+\frac{2}{3}=\frac{5}{4}=1\frac{1}{4}=1,25\\ \\2)(\frac{1}{2}-\frac{1}{3})^3:(\frac{1}{3}-\frac{1}{4})^2*(\frac{3}{2})^2=(\frac{1}{6})^3:(\frac{1}{12})^2*\frac{9}{4}=\frac{1}{216}:\frac{1}{144}*\frac{9}{4}=\frac{1}{24}*144*\frac{1}{4}=\\\\\frac{1}{24}*36=\frac{1}{2}*3=\frac{3}{2}=1\frac{1}{2}=1,5$