Răspuns :
a) [tex] \frac{8}{9} =\frac{5}{9}+ \frac{3}{9} [/tex]
b) [tex] \frac{9}{12} = \frac{4}{12} + \frac{5}{12} [/tex]
c) [tex] \frac{12}{4} =\frac{5}{4}+ \frac{7}{4} [/tex]
b) [tex] \frac{9}{12} = \frac{4}{12} + \frac{5}{12} [/tex]
c) [tex] \frac{12}{4} =\frac{5}{4}+ \frac{7}{4} [/tex]