2) (4/9 − 3 1/15) · 9; 6) (1/13 − 2 3/4) · 26; 9) 4 7/8 : (2 3/4 + 1 10/19)

1. \(\left(\frac49-3\frac1{15}\right)\cdot9=\left(\frac49-\frac{46}{15}\right)\cdot9=\left(\frac{20-138}{45}\right)\cdot9=-\frac{118}{5}\).
2. \(\left(\frac1{13}-2\frac34\right)\cdot26=\left(\frac1{13}-\frac{11}{4}\right)\cdot26=\frac{4-143}{52}\cdot26=-\frac{139}{2}\).
3. \(4\frac78:\left(2\frac34+1\frac{10}{19}\right)=\frac{39}{8}:\left(\frac{11}{4}+\frac{29}{19}\right)=\frac{39}{8}:\frac{325}{76}=\frac{39}{8}\cdot\frac{76}{325}=\frac{57}{50}\).

Ответ: 2) \(-\frac{118}{5}\); 6) \(-\frac{139}{2}\); 9) \(\frac{57}{50}\).