如题所述
第1个回答 2023-06-14
7/9-(1/3+4/9)
=7/9-1/3-4/9
=1/3-1/3
=0本回答被网友采纳
=7/9-1/3-4/9
=1/3-1/3
=0本回答被网友采纳
第2个回答 2023-06-14
7/9-(1/3+4/9)
=7/9-1/3-4/9
=7/9-4/9-1/3
=3/9-1/3
=1/3-1/3
=0
=7/9-1/3-4/9
=7/9-4/9-1/3
=3/9-1/3
=1/3-1/3
=0