Odpowiedź:
[tex] \frac{5}{7} \times 1\frac{3}{4} - {( \frac{1}{2} )}^{2} = \frac{5}{7} \times \frac{7}{4} - \frac{1}{4} = \frac{5}{4} - \frac{1}{4} = \frac{4}{4} = 1[/tex]
[tex] {( \frac{1}{3}) }^{2} \times 1 \frac{1}{8} + 1 \frac{1}{2} = \frac{1}{9} \times \frac{9}{8} + 1 \frac{1}{2} = \frac{1}{8} + 1 \frac{4}{8} = 1 \frac{5}{8} [/tex]
