(9*2⼀7+7*2⼀9)⼀(5⼀7+5⼀9)的简便运算

2025-03-27 09:29:58
推荐回答(1个)
回答1:

(9又2/7+7又2/9)/(5/7+5\9)
=(65/7+65/9)/(5/7+5/9)
=[13*(5/7+5/9)]/(5/7+5/9)
=13