[tex] \frac{5}{2} \div \frac{5}{7} = \frac{4}{9} \div \frac{5}{6} \\ \frac{5}{2} \times \frac{7}{5} = \frac{4}{9} \times \frac{6}{5} \\ \frac{7}{2 } = \frac{8}{15} \\ 105 = 16[/tex]
este falsa
[tex] \frac{3}{2} \div \frac{9}{8} \\ \frac{3}{2} \times \frac{8}{9} \\ \frac{4}{3} [/tex]
regulile pe care le-am folosit sunt:
1.produsi mezi =produsi extremi
2.inversarea fractiilor.
3.simplificarea pe diagonala.
