8/9减8/9乘5/12除以3/4简便计算
问题描述：
8/9减8/9乘5/12除以3/4简便计算
答
8/9-8/9x5/12÷3/4
=8/9-8/9x5/12×4/3
=8/9x1-8/9x5/9
=8/9x(1-5/9)
=8/9x4/9
=32/81