Đáp án:
Tham khảo
Giải thích các bước giải:
a)A=[($\frac{27}{25}$-$\frac{4}{50}$):$\frac{4}{7}$]:[$\frac{119}{36}$:($\frac{17}{36}$:$\frac{1}{2}$)]
=[($\frac{54}{50}$-$\frac{4}{50}$):$\frac{4}{7}$]:[$\frac{119}{36}$:$\frac{17}{72}$]
=[$\frac{50}{50}$:$\frac{4}{7}$]:[$\frac{119}{36}$:$\frac{72}{36}$]
=$\frac{7}{4}$:14
=$\frac{7}{4}$.$\frac{1}{14}$=$\frac{1}{8}$
b)B=$\frac{1+\frac{1}{4}}{1-\frac{1}{4}}$:$\frac{1+\frac{1}{8}}{1-\frac{1}{8}}$ =$\frac{\frac{5}{4}}{\frac{3}{4}}$:$\frac{\frac{9}{8}}{\frac{7}{8}}$=$\frac{5}{3}$:$\frac{9}{7}$=$\frac{5}{3}$. $\frac{7}{9}$
= $\frac{35}{27}$
