9⼀8-括号6⼀7-1⼀9括号完了等于几

9/8-括号6/7-1/9括号完了等于几
2025-06-22 14:47:10
推荐回答(2个)
回答1:


回答2:

8/9-(6/7-1/9)
=8/9-6/7+1/9
=8/9+1/9-6/7
=1-6/7
=1/7