(9又2/7+7又2/9)/(5/7+5/9) 巧算
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 08:11:49
![(9又2/7+7又2/9)/(5/7+5/9) 巧算](/uploads/image/z/1246398-6-8.jpg?t=%EF%BC%889%E5%8F%882%2F7%2B7%E5%8F%882%2F9%EF%BC%89%2F%EF%BC%885%2F7%2B5%2F9%EF%BC%89+%E5%B7%A7%E7%AE%97)
(9又2/7+7又2/9)/(5/7+5/9) 巧算
(9又2/7+7又2/9)/(5/7+5/9) 巧算
(9又2/7+7又2/9)/(5/7+5/9) 巧算
(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
(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
(9 2/7+7 2/9)/(5/7+5/9)
=(65/7+65/9)/(5/7+5/9)
=13