27又8/15÷7简便运算
问题描述：
27又8/15÷7简便运算
答
=（28-7/15）/7
=28/7-(7/15)/7
=4-1/15
=3 又14/15
27又8/15÷7简便运算
=（28-7/15）/7
=28/7-(7/15)/7
=4-1/15
=3 又14/15