Odpowiedź:
[tex] 1\frac{5}{6} - 1 \frac{1}{12} - 0.5 \div \frac{2}{3} = 1 \frac{10}{12} - 1 \frac{1}{12} - \frac{1}{2} \times \frac{3}{2} = \frac{9}{12} - \frac{3}{4 } = \frac{9}{12} - \frac{9}{12} = 0[/tex]
[tex] {3}^{2} - {2}^{3} \times ( - \frac{1}{8} )= 9 - 8 \times ( - \frac{1}{8} ) = 1 \times ( - \frac{1}{8} ) = - \frac{1}{8} [/tex]
[tex]( - \frac{4}{5} ) \div (0.2 \times {2}^{3} - 0.8) = ( - \frac{5}{4} ) \times ( \frac{1}{5} \times 8 - \frac{4}{5} )= ( - \frac{5}{4} ) \times ( \frac{8}{5} - \frac{4}{5} ) = ( - \frac{5}{4} ) \times \frac{4}{5} = - 1[/tex]
