[tex]\displaystyle \frac{5}{60} : \left(- \frac{1}{30} \right)-\left(- \frac{6}{10} \right)= \frac{5}{60} \cdot \left(-30 \right)+ \frac{6}{10} =- \frac{150}{60} + \frac{6}{10} = \\ \\ =- \frac{150}{60} + \frac{36}{60} =- \frac{114}{60} =- \frac{19}{10} [/tex]
