Question

вычеслите 1 5/6÷(2/3-2/7)​

Answer 1

$\displaystyle \tt 1\frac{5}{6}\div(\frac{2}{3}-\frac{2}{7})=\frac{11}{6}\div(\frac{14}{21}-\frac{6}{21})=\frac{11}{6}\div\frac{8}{21}=\frac{11}{6}\cdot\frac{21}{8}=\frac{11}{2}\cdot\frac{7}{8}=\frac{11\cdot7}{2\cdot8}=\frac{77}{16}=4,8125$