9⼀10减括号1⼀4+7⼀20括号除以3⼀4

2025-06-22 02:29:10
推荐回答(1个)
回答1:

9/10-(1/4+7/20)÷3/4
=9/10-(5/20+7/20)÷3/4
=9/10-12/20x4/3
=9/10-12/15
=27/30-24/30
=1/10