Номер 242 Помогите плиз

1) $12: 1\frac{1}{5} =12: \frac{5*1+1}{5} =12: \frac{6}{5} =12* \frac{5}{6} = \frac{12*5}{6} = \frac{2*6*5}{6} = \frac{10}{1}$
2)0,8:1,6= $\frac{8}{10}: \frac{16}{10}= \frac{8}{10} \frac{10}{16}= \frac{8*10}{10*8*2}= \frac{1}{2}$
3) $2\frac{1}{6}: 4 \frac{1}{3}= \frac{2*6+1}{6}: \frac{4*3+1}{3}= \frac{13}{6}:\frac{13}{3} = \frac{13}{2*3}* \frac{3}{13} = \frac{1}{2}$
4)5,6:14= $\frac{56}{10} :14= \frac{2*2*14}{2*5*14} = \frac{2}{5}$
5) $\frac{4}{15} :\frac{2}{3}= \frac{2*2}{3*5}* \frac{3}{2} = \frac{2}{5}$
6)12,3:1,23= $\frac{123}{10}: \frac{123}{100} = \frac{123}{10}* \frac{10*10}{123} = \frac{10}{1}$