45×括号8⼀9 12分之5-3⼀5括号简便计算

2024-11-27 14:02:04
推荐回答(1个)
回答1:

45X(8/9+5/12-3/5)
=45X(8/9)+45X(5/12)-45X(3/5)
=40+75/4-27
=13+18+3/4
=31又4分之3