题目-19.8-(-20.3)-(+20.2)-10.8怎样做?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/07/05 19:44:11
题目-19.8-(-20.3)-(+20.2)-10.8怎样做?题目-19.8-(-20.3)-(+20.2)-10.8怎样做?题目-19.8-(-20.3)-(+20.2)-10.8怎样做?-19.

题目-19.8-(-20.3)-(+20.2)-10.8怎样做?
题目-19.8-(-20.3)-(+20.2)-10.8怎样做?

题目-19.8-(-20.3)-(+20.2)-10.8怎样做?
-19.8-(-20.3)-(+20.2)-10.8
=-19.8+20.3-20.2-10.8
=(20.3-19.8)-(20.2+10.8)
=0.5-31
=-30.5