一又8⼀13×13⼀42 2⼀3括起来除以括号里面的11-1又2⼀3怎么做?

2025-06-26 22:39:11
推荐回答(1个)
回答1:

(一又8/13×13/42+ 2/3)÷(11-1又2/3)
=(21/13×13/42+2/3)÷(28/3)
=(1/2+2/3)×3/28
=7/6×3/28
=1/8.