va rog mult!!!
dau coroană

[tex] \frac{9}{10} = \frac{5}{9} + \frac{4}{9} [/tex]
[tex] \frac{9}{10} = \frac{3}{10} + \frac{6}{10} [/tex]
[tex] \frac{9}{10} = \frac{1}{10} + \frac{8}{10} [/tex]


[tex] \frac{25}{100} = \frac{1}{100} + \frac{24}{100} [/tex]
[tex] \frac{25}{100} = \frac{13}{100} + \frac{12}{100} [/tex]
[tex] \frac{25}{100} = \frac{10}{100} + \frac{15}{100} [/tex]