6.28*(-23.3)-3.14*35.2-1.57*36.4=?简便
问题描述:
6.28*(-23.3)-3.14*35.2-1.57*36.4=?简便
答
6.28*(-23.3)-3.14*35.2-1.57*36.4
=3.14*(-46.6)-3.14*35.2-3.14*18.2
=-3.14*(46.6+35.2+18.2)
=-3.14*100
=-314