Б. 1) 5/6 + 7/33 + 9/22; 2) 6/11 : 5/8 : 9/40 + 0,01; 3) (1 − 1/11 + 1/121) : (8/20 + 4/12).

1. \(\frac{5}{6}+\frac{7}{33}+\frac{9}{22}=\frac{55+14+27}{66}=\frac{96}{66}=\frac{16}{11}\).
2. \(\frac{6}{11}:\frac{5}{8}:\frac{9}{40}+0,01=\frac{6}{11}\cdot\frac{8}{5}\cdot\frac{40}{9}+\frac{1}{100}=\frac{128}{33}+\frac{1}{100}=\frac{12833}{3300}\).
3. \(\left(1-\frac{1}{11}+\frac{1}{121}\right):\left(\frac{8}{20}+\frac{4}{12}\right)=\frac{111}{121}:\frac{11}{15}=\frac{111}{121}\cdot\frac{15}{11}=\frac{1665}{1331}\).

Ответ: 1) \(\frac{16}{11}\); 2) \(\frac{12833}{3300}\); 3) \(\frac{1665}{1331}\).