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Efectuati
a)(+3/4)-(+2/3)=
b)(-5/6)-(+7/9)=
c)(-11/12)-(-5/8)=
d)(-5/4)-(+7/6)=
e)(+5/3)-(-3/4)=


Răspuns :

a) 1/12
b) -87/54 = -27/18 = -3/2
c) -7/24
d) -29/12
e) 29/12