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efectuati : (-0,8(3))-(-0,75)

Răspuns :

0,8(3)=(83-8)/90=75/90=5/6
0,75=75/100=3/4


(-0,8(3))-(-0,75) =-5/6-(-3/4)=-5/6+3/4=(-10+9)/12=-1/12=0,08(3)