6.8-3.9*4/13+2.8 用简便方法计算
问题描述:
6.8-3.9*4/13+2.8 用简便方法计算
答
6.8-3.9*4/13+2.8
=6.8-(3.9/13)*4+2.8
=6.8-1.2+2.8
=8.4