简便计算71.9/0.5+18.1*2= 23.2*4+1.8/0.25= 如何算
问题描述:
简便计算71.9/0.5+18.1*2= 23.2*4+1.8/0.25= 如何算
答
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