7/11*4/9+4/11*7/9 简算
问题描述:
7/11*4/9+4/11*7/9 简算
答
7/11*4/9+4/11*7/9
=7/11*4/9+7/11*4/9
=7/11*(4/9+4/9)
=7/11*8/9
=56/99