(2/3-1/9): 5/6 <br />2 целых 7/8*5 целых 1/3: 3 целых 5/6<br />6 целых 2/3:(4/5-7/20)<br...

Решите задачу:

$( \frac{2}{3}- \frac{1}{9}): \frac{5}{6}= \frac{5}{9} * \frac{6}{5}= \frac{2}{3}$
$2 \frac{7}{8} *5 \frac{1}{3}:3 \frac{5}{6}= \frac{23}{8}* \frac{16}{3}: \frac{23}{6} = \frac{23*2*6}{3*23} =4$
$6 \frac{2}{3}( \frac{4}{5}- \frac{7}{20})= \frac{20}{3}* \frac{9}{20}=3$
$\frac{1}{9}: \frac{5}{6}= \frac{1}{9}* \frac{6}{5}= \frac{2}{15}$