Exercițiul 4 dau coroana

[-7]=-7, {-7}=0
[8]=8, {8}=0
[3,21]=3, {3,21}=0,21
[-4,12]=-5, {-4,12}=-4,12-(-5)=-4,12+5=0,88
[-18/5]=[-3,6]=-4, {-18/5}={-3,6}=-3'6-(-4)=-3,6+4=0,4
[35/10]=[3,5]=3, {35/10}={3,5}=0,5