Salut,sunt Ava si va rog sa ma ajutati...
1)1 supra 9 + 5supra7=
2)5supra84 + 1supra168=
3)3supra32 + 7supra8=

4)2supra5 + 3supra4=

Sper ca ai inteles in mare.

[tex] \frac{1}{9} + \frac{5}{7} = \frac{7}{63} + \frac{45}{63} = \frac{52}{63} [/tex]

[tex] \frac{5}{84} + \frac{1}{164} = \frac{25}{164} + \frac{1}{164} = \frac{26}{164} [/tex]

[tex] \frac{3}{32} + \frac{7}{8} = \frac{3}{32} + \frac{28}{32} = \frac{31}{32} [/tex]

[tex] \frac{2}{5} + \frac{3}{4} = \frac{8}{20} + \frac{15}{20} = \frac{23}{20} [/tex]