-3.14*35.2+6.28*(-23.3)-1.57*36.4=-(3.14*35.2+6.28*23.3+1.57*36.4)=-[3.14*35.2+3.14*2*23.3+(3.14/2)*36.4]=-3.14*(35.2+46.6+18.2)=-3.14*100=-314也可以提1.57为公因子,一样的.
=-3.14*35.2-3.14*46.6-3.14*18.2=-3.14*100=-314