chengfang操作。
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:2024/07/28 07:09:12
![](http://img.wesiedu.com/upload/0/ff/0ff9fa3105cc46211b81034afceeccc0.jpg)
![chengfang操作。](/uploads/image/z/19828929-57-9.jpg?t=chengfang%E6%93%8D%E4%BD%9C%E3%80%82)
解题思路: 用减法进行计算 减去一个数等于加上这个数的相反数
解题过程:
(-38.4)-(-109.8)
=-38.4+109.8
=71.4 m
即A比B处高71.4m,
(-72.3)-(-109.8)
=-72.3+109.8
=37.5 m
即C比B处高37.5m,
(-38.4)-(-72.3)
=-38.4+72.3
=33.9 m
即A比C处高33.9m,
解题过程:
(-38.4)-(-109.8)
=-38.4+109.8
=71.4 m
即A比B处高71.4m,
(-72.3)-(-109.8)
=-72.3+109.8
=37.5 m
即C比B处高37.5m,
(-38.4)-(-72.3)
=-38.4+72.3
=33.9 m
即A比C处高33.9m,