Răspuns :

2\5= 4/10=6/15=10/25=18/45

[tex] \frac{2}{5} = \frac{a}{10} = \frac{6}{b} = \frac{c}{25} = \frac{18}{d} [/tex]

Amplificam cu 2

[tex] \frac{2}{5} = \frac{4}{10 } [/tex]

Amplificam cu 3

[tex] \frac{2}{5} = \frac{6}{15} [/tex]

Amplificam cu 5

[tex] \frac{2}{5} = \frac{10}{25} [/tex]

Amplificam cu 9

[tex] \frac{2}{5} = \frac{18}{45} [/tex]