(能简算的要用简便方法计算) 1÷2.5+2.5*0.4+1简便
问题描述:
(能简算的要用简便方法计算) 1÷2.5+2.5*0.4+1
简便
答
1÷2.5+2.5*0.4+1
=2/5+1+1
=2.4