diferenta a doua fractii subunitare:
1.[tex] \frac{8}{9} - \frac{5}{9} = \frac{3}{9} [/tex]
2.[tex] \frac{7}{9}- \frac{2}{9} = \frac{5}{9} [/tex]
diferenta a doua fractii supraunitare:
1.[tex] \frac{15}{9} - \frac{2}{9}= \frac{13}{9} [/tex]
2.[tex] \frac{20}{9} - \frac{10}{9} = \frac{10}{9} [/tex]
