№13 Выполните деление: а) 3ц 1/9 : 2ц 1/3; б) 16/21 : 20/49; в)3ц 2/9 :2ц г)1ц 2/3 : 2ц...

Решите задачу:

$\\3\frac{1}{9} : 2\frac{1}{3} = \frac{28}{9} : \frac{7}{3} = \frac{28}{9} * \frac{3}{7} = \frac{4}{3} = 1 \frac{1}{3}\\$
$\\\frac{16}{21} : \frac{20}{49} = \frac{16}{21} * \frac{49}{20} = \frac{4}{3} * \frac{7}{5} = \frac{28}{15} = 1 \frac{13}{15}\\$
$\\3\frac{2}{9} : 2 = \frac{29}{9} * \frac{1}{2} = \frac{29}{18} = 1 \frac{11}{18}\\$
$\\1\frac{2}{3} : 2\frac{1}{2} = \frac{5}{3} : \frac{5}{2} = \frac{5}{3} * \frac{2}{5} = \frac{2}{3}\\$