[tex] \frac{2}{11} * \frac{3}{9} + \frac{3}{9} * \frac{2}{10} - \frac{6}{10} =0
[/tex]
[tex] \frac{6}{99}+ \frac{6}{90}- \frac{6}{10} =[/tex] (amplific prima cu 10,a doua cu 11 si a treia 99)
[tex] \frac{60}{990}- \frac{66}{990} - \frac{594}{990} =- \frac{468}{990} [/tex]
(simplifici de mai multe ori cu 3 si ajungi la)[tex] \frac{-26}{55} \ \textless \ 1=\ \textgreater \ 0[/tex]
