(18.5*3.6+3.6*2.5）÷0.18递等式计算
问题描述：
(18.5*3.6+3.6*2.5）÷0.18递等式计算
答
(18.5*3.6+3.6*2.5）÷0.18
=3.6×（18.5+2.5）÷0.18
=3.6×21÷0.18
=75.6÷0.18
=420