简便计算71.9/0.5+18.1*2= 23.2*4+1.8/0.25= 如何算

题目

简便计算71.9/0.5+18.1*2= 23.2*4+1.8/0.25= 如何算

答案

71.9/0.5+18.1*2
= 71.9*2+18.1*2
=（71.9+18.1）*2
=90*2
=180
23.2*4+1.8/0.25
=23.2*4+1.8*4
=（23.2+1.8)*4
=25*4
=100