0,75×1/9+1/8-0,8×3/8

[tex] \frac{75}{100} \times \frac{1}{9} + \frac{1}{8} - \frac{8}{10} \times \frac{3}{8} \\ = \frac{75}{900} + \frac{1}{8} - \frac{24}{80} \\ = \frac{75}{900} + \frac{10 - 24}{80} \\ = \frac{75}{900} - \frac{14}{80} \\ = \frac{1}{12} - \frac{7}{40} \\ = 0.08 - 0.175 \\ = - 0.095 \\ = - \frac{9.5}{100} [/tex]