1除以0.25乘(1.28除以3.2)怎样用简便方法计算
问题描述：
1除以0.25乘(1.28除以3.2)怎样用简便方法计算
答
1除以0.25乘(1.28除以3.2)
=1/0.25*(1.28/3.2)
=4*1.28/3.2
=1.28/0.8
=(1+0.28)/0.8
=1.25+0.35
=1.6