-2 supra 3 :(4 supra 9 : 2 supra 27 );

Raspuns:
[tex] - \frac{2}{3} \div ( \frac{4}{9} \div \frac{2}{27} )[/tex]
[tex] - \frac{2}{3} \div (2 \times 3)[/tex]
[tex] - \frac{2}{3} \div 6[/tex]
[tex] - \frac{2}{3} \times \frac{1}{6} [/tex]
[tex] - \frac{1}{3} \times \frac{1}{3} [/tex]
[tex] - \frac{1}{9} [/tex]
Explicație pas cu pas: