十二又2⼀5-(一又2⼀7+2又2⼀5(简便计算

十二又2/5-(一又2/7+2又2/5(简便计算
2025-04-09 04:37:56
推荐回答(1个)
回答1:

12又2/5-(1又2/7+2又2/5)
=12又2/5-1又2/7-2又2/5
=12又2/5+2又2/5-1又2/7
=10-1又2/7
=8又5/7