Помогите пожалуйста, буду очень благодарна.

A) $\frac{3}{5}* \frac{4}{5}= \frac{12}{25}$
Б) $\frac{4}{7} * \frac{5}{8}= \frac{1}{7} * \frac{5}{2}= \frac{5}{14}$
В) $\frac{11}{15} * \frac{5}{9}= \frac{11}{3}*\frac{1}{9}= \frac{11}{27}$
Г) $( \frac{4}{5})^2= \frac{16}{25}$
Д) $\frac{2}{3}: \frac{7}{11}= \frac{2}{3}* \frac{11}{7}= \frac{22}{21}=1 \frac{1}{21}$
Е) $\frac{12}{25}: \frac{4}{5}= \frac{12}{25}* \frac{5}{4}= \frac{3}{5}* \frac{1}{1}= \frac{3}{5}$
Ж) $\frac{5}{8}:4=\frac{5}{8}: \frac{4}{1}=\frac{5}{8}* \frac{1}{4}= \frac{5}{32}$
З) $6: \frac{3}{8}= \frac{6}{1}: \frac{3}{8}= \frac{6}{1}* \frac{8}{3}= \frac{48}{3}= \frac{16}{1}=16$
2.
А) $\frac{15}{16}*( \frac{24}{25}: \frac{9}{10})= \frac{15}{16}*( \frac{24}{25}* \frac{10}{9})= \frac{15}{16}*( \frac{8}{5}* \frac{2}{3})= \frac{15}{16}* \frac{16}{15}=1$
Б) $\frac{14}{15}: \frac{7}{5}* \frac{9}{10}= \frac{14}{15}* \frac{5}{7}* \frac{9}{10}= \frac{2}{3}* \frac{9}{10}= \frac{3}{5}$
В) $\frac{4}{5}* \frac{5}{6}* \frac{6}{7}* \frac{7}{8}= \frac{2}{1}* \frac{1}{3}* \frac{3}{1}* \frac{1}{4}= \frac{6}{12}= \frac{1}{2}$