7⼀12除以[(1一8⼀15)除以5⼀2

2025-03-09 22:48:18
推荐回答(1个)
回答1:

7/12除以[(1一8/15)除以5/2]
7/12÷[(1-8/15)÷5/2]
=7/12÷[7/15÷5/2]
=7/12÷14/75
=25/8