18/19*15/17+15/19*16/17
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/10 22:53:44
18/19*15/17+15/19*16/17
![18/19*15/17+15/19*16/17](/uploads/image/z/5087181-21-1.jpg?t=18%2F19%2A15%2F17%2B15%2F19%2A16%2F17)
18/19*15/17+15/19*16/17
=18/19*15/17+16/19*15/17
=15/17*(18/19+16/19)
=15/17*34/19
=30/19
=18/19*15/17+16/19*15/17
=15/17*(18/19+16/19)
=15/17*34/19
=30/19