Ответ:
- а) \(4\frac{1}{12}-6{,}5=\frac{49}{12}-\frac{13}{2}=\frac{49-78}{12}=-\frac{29}{12}=-2\frac{5}{12}\).
- б) \(-0{,}4-1\frac{11}{18}=-\frac{2}{5}-\frac{29}{18}=-\frac{36+145}{90}=-\frac{181}{90}=-2\frac{1}{90}\).
- в) \((-9\frac{8}{7})\cdot(-1\frac{10}{11})=\left(-\frac{71}{7}\right)\cdot\left(-\frac{21}{11}\right)=\frac{1491}{77}=\frac{213}{11}=19\frac{4}{11}\).
- г) \(-1\frac{1}{80}:1{,}35=-\frac{81}{80}:\frac{27}{20}=-\frac{81}{80}\cdot\frac{20}{27}=-\frac{3}{4}\).
Ответ: а) \(-2\frac{5}{12}\); б) \(-2\frac{1}{90}\); в) \(19\frac{4}{11}\); г) \(-\frac{3}{4}\).
