(+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.
答
=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,