A) 3,2*{189,35-2,3*[4-0,1*(3+0,4)]}= 3,2*[189,35-2,3*(4-0,1*3,4)]=3,2*[189,35-2,3*(4-0,34)]=3,2*(189,35-2,3*3,66)= 3,2*(189,35-8.418)=3,2*180.932=578.9824
Restul exercitiilor se fac la fel, dar trebuie sa respectii ordinea efectuarii operatiilor intr-un exercitiu si parantezele.