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a).7/9 ori 2/5 b). 4/9 : 28/27 c). (4/5) totul la 2

DAU COROABNNNNAAA !!!+!!!.


Răspuns :

7/9*2/5=14/45
4/9:28/27=108/252
(4/5)^2=0,8^2=0,64