[tex](7-5\frac25)\cdot\frac14=\\\\=(6\frac55-5\frac25)\cdot\frac14=\\\\=1\frac35\cdot\frac14=\\\\=\frac85\cdot\frac14=\\\\=\frac25[/tex]
Odpowiedź:
[tex](7 - 5 \frac{2}{5}) \times \frac{1}{4} = 1 \frac{3}{5} \times \frac{1}{4} = \frac{8}{5} \times \frac{1}{4} = \frac{8}{20} = \frac{2}{5} [/tex]
