简算 5/9+7/9-5/8-3/8
问题描述:
简算 5/9+7/9-5/8-3/8
答
5/9+7/9-5/8-3/8
=12/9-(5/8+3/8)
=4/3-1
=1/3
答
=12/9-1=1/3