2-2⼀7-2⼀5等于几?

2025-06-20 16:32:04
推荐回答(1个)
回答1:

2-2/7-2/5
=(2X7X5)/(5X7)-(2X5)/(7X5)-(2X7)/(5X7)
=70/35-10/35-14/35
=(70-10-14)/35
=46/35