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calculati:
ex 18 va rog!!!!


Răspuns :

dupa ce am introdus intregii in fractie am, 
(24/5·26/6 -14/3·15/4+33/2) /(66/7-34/63·9/2) ·(43/5-11/5) / 19 ·7/8=
(20- 70/4+33/2)  /  (66/7-17/7)  ·(32/5)  / 19  ·7/8=
(76/4) / 7·(32/5)  /19 ·7/8=
76/28·32/5·1/19=4/5