Thực hiện các phép tính sau:\(\begin{array}{l}a)\;...

Câu hỏi: Thực hiện các phép tính sau:\(\begin{array}{l}a)\;\frac{5}{9} \times \frac{3}{8} &  &  & b)\;6 \times \frac{3}{7} &  &  & c)\;\frac{7}{{15}} \times 2\\d)\;\frac{4}{9}:\frac{2}{3} &  &  & e)\;7:\frac{2}{3}  &  &  & f)\;\frac{8}{{19}}:3\end{array}\)

A \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{18}}{7}  &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{{21}}{2} &  & f)\;\frac{8}{{57}}\end{array}\)

B \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{18}}{7}  &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{3}{4} &  &  & e)\;\frac{2}{{21}} &  & f)\;\frac{8}{{57}}\end{array}\)

C \(\begin{array}{l}a)\;\frac{{15}}{{24}} &  &  & b)\;\frac{{18}}{7} &  & c)\;\frac{{14}}{{15}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{{21}}{2} &  & f)\;\frac{8}{{54}}\end{array}\)

D \(\begin{array}{l}a)\;\frac{5}{{24}} &  &  & b)\;\frac{{15}}{7} &  & c)\;\frac{7}{{30}}\\d)\;\frac{2}{3} &  &  & e)\;\frac{2}{{21}} &  & f)\;\frac{8}{{57}}\end{array}\)