Bài làm :
Ta có :
\(\frac{7}{11}\div\left(\frac{2}{10}+\frac{5}{11}\right)+\frac{1}{36}=\frac{7}{11}\div\frac{36}{55}+\frac{1}{36}=\frac{35}{36}+\frac{1}{36}=\frac{36}{36}=1\)
Ta có: \(\frac{7}{11}\div\left(\frac{2}{10}+\frac{5}{11}\right)+\frac{1}{36}\)
\(=\frac{7}{11}\div\frac{36}{55}+\frac{1}{36}\)
\(=\frac{35}{36}+\frac{1}{36}\)
\(=1\)