数学题:5/9+7/9-1.625-2.375+3

问题描述:

数学题:5/9+7/9-1.625-2.375+3

5/9+7/9-1.625-2.375+3
=(5+7)/9-(1.625+2.375)+3
=12/9-4+3
=4/3-1
=1/3