Odpowiedź :
[tex] \frac{4}{5} \times 9 = \frac{4}{5} \times \frac{9}{1} = \frac{4 \times 9}{5 \times1 } = \frac{36}{5} = 7 \frac{1}{5}[/tex]
[tex] \frac{4}{5} \times 9 = \frac{4}{5} \times \frac{9}{1} = \frac{4 \times 9}{5 \times1 } = \frac{36}{5} = 7 \frac{1}{5}[/tex]