1⼀4 1⼀5括号除以7⼀3 7⼀10等于多少?1

2025-05-10 22:56:39
推荐回答(1个)
回答1:

(1/4+1/5)÷(7/3+7/10)
=(5/20+4/20)÷(70/30+21/30)
=9/20÷91/30
=27/182