Răspuns:
Explicație pas cu pas:
[tex] - 0.8(3) - 0.5 \cdot( - 1.8) = \\ - \frac{83 - 8}{90} - \frac{ {5}^{(5} }{10} \cdot \left(- \frac{ {18}^{(2} }{10} \right) = \\ - \frac{ {75}^{(15} }{90} - \frac{1}{2} \cdot \left( - \frac{9}{5} \right) = \\ - \frac{5}{6} - \left( - \frac{9}{10} \right) = - \frac{^{5)} 5}{6} + \frac{ ^{3)} 9}{10} = \\ - \frac{25}{30} + \frac{27}{30} = \frac{ {2}^{(2} }{30} = \boxed{ \bold{ \frac{1}{15} }}[/tex]
