Odpowiedź :
[tex]3 \frac{1}{8} \div 2 \frac{1}{8} - 1.75 = \frac{25}{8} \div \frac{17}{8} - 1 \frac{3}{4} = \frac{25}{8} \times \frac{8}{17} - \frac{7}{4} = \frac{25}{17} - \frac{7}{4} = \frac{100}{68} - \frac{119}{68} = - \frac{19}{68} [/tex]
[tex]3 \frac{1}{8} \div 2 \frac{1}{8} - 1.75 = \frac{25}{8} \div \frac{17}{8} - 1 \frac{3}{4} = \frac{25}{8} \times \frac{8}{17} - \frac{7}{4} = \frac{25}{17} - \frac{7}{4} = \frac{100}{68} - \frac{119}{68} = - \frac{19}{68} [/tex]