Bài làm :
Ta có :
\(\frac{7}{11}\div\left(\frac{2}{10}+\frac{5}{11}\right)+\frac{1}{30}=\frac{7}{11}\div\frac{36}{55}+\frac{1}{30}=\frac{35}{36}+\frac{1}{30}=\frac{181}{180}\)
Bài làm :
\(\frac{7}{11}:\left(\frac{2}{10}+\frac{5}{11}\right)+\frac{1}{30}\)
\(=\frac{7}{11}:\frac{36}{55}+\frac{1}{30}\)
\(=\frac{35}{36}+\frac{1}{30}\)
\(=\frac{181}{180}\)
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