-19.8-(-20.3)-(+20.2)-10.8=?
来源:百度知道 编辑:UC知道 时间:2024/05/22 20:22:01
列式计算
-19.8-(-20.3)-(20.2)-10.8 = -30.5
http://www.baidu.com/baidu?tn=winzsy_pg&ie=utf-8&word=-19.8-%EF%BC%88-20.3%EF%BC%89-%EF%BC%88%2B20.2%EF%BC%89-10.8
-19.8-(-20.3)-(+20.2)-10.8
=-19.8+20.3-20.2-10.8
=-20+0.2+20+0.3-20-0.2-10-0.8
=-20+20-20-10+0.3+0.2-0.2-0.8
=-30-0.5
=-30.5
-19.8-(-20.3)-(+20.2)-10.8
=?
-30.7
-30.5