Ответ:
- \(-1\frac{3}{8}-2\frac{5}{12}=-\frac{11}{8}-\frac{29}{12}=-\frac{33}{24}-\frac{58}{24}=-\frac{91}{24}\).
\(5\frac{5}{12}=\frac{65}{12}\).
\(-\frac{91}{24}:\frac{65}{12}=-\frac{91}{24}\cdot\frac{12}{65}=-\frac{7}{10}\). - \(5\frac{8}{9}=\frac{53}{9}\), \(1\frac{17}{36}=\frac{53}{36}\).
\(\frac{53}{9}:\frac{53}{36}=4\).
\(4+1\frac{1}{4}=4+\frac{5}{4}=\frac{21}{4}\).
\(\frac{21}{4}\cdot\frac{5}{21}=\frac{5}{4}\). - \(0,64+0,9=1,54\).
\(65,7-69,2=-3,5\).
\(1,54\cdot(-3,5)=-5,39\).
Ответ: 1) \(-\frac{7}{10}\); 2) \(\frac{5}{4}\); 3) \(-5,39\).
