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} = 0.4[/tex]
[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} = 0.4[/tex]