calculeaza,simplificand mai intai fractiile:
A)7/3-20/12;
B)40/100-1/20;
C)11/7-55/77;
D)28/32-15/40;
E)14/49-5/35;
F)18/20-9/30;
va rooggg ajutatimaaaa!!!!!!!!!!!!!!!.!!!!!
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