Question

помогите пожалуйста, буду очень благодарна.

Answer 1

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) $frac{4}{5}* frac{5}{6}* frac{6}{7}* frac{7}{8}= frac{2}{1}* frac{1}{3}* frac{3}{1}* frac{1}{4}= frac{6}{12}= frac{1}{2}$