括号四分之二十七减五分之十九括号除五分之四.简便计算怎么算?,

2025-04-14 01:58:55
推荐回答(1个)
回答(1):

(27/4-19/5)÷4/5
=27/4x5/4-19/5x5/4
=135/16-19/4
=135/16-76/16
=59/16