Răspuns:
A) [12/25 × 5/4] : 9/35 = 3/5 : 9/35 = 3/5 × 35/9 = 7/3
B) 12/25 : ( 4/5 × 35/9) = 12/25 : 28/9 = 12/25 × 9/28 = 3/25 × 9/4 = 27/ 100 (nu stiu daca e bine)
D) (11/12 × 18/13) : 22/33 = 22/33 : 33/26 = 22/33 × 26/33 = 572/33
E) asta nu stiu cum vine:)))