(+15)+(﹣25)+(+20)+(﹣40)等于几?要有算式.

问题描述:

(+15)+(﹣25)+(+20)+(﹣40)等于几?要有算式.

—30

(+15)+(-25)+(+20)+(-40)
原式=15-25+20-40
=-10+20-40
=10-40
=30

原式=15+20-(25+40)=35-65=-30

(+15)+(﹣25)+(+20)+(﹣40)
=15+20-25-40
=35-65
= -30

=15-25+20-40
=-30
如果()是绝对值
=15+25+20+40
=100
希望能帮你忙,懂了请采纳,

=-10+20-40=-10-40=-50