(+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
—30
答
(+15)+(-25)+(+20)+(-40)
原式=15-25+20-40
=-10+20-40
=10-40
=30
答
原式=15+20-(25+40)=35-65=-30
答
(+15)+(﹣25)+(+20)+(﹣40)
=15+20-25-40
=35-65
= -30
答
=15-25+20-40
=-30
如果()是绝对值
=15+25+20+40
=100
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答
=-10+20-40=-10-40=-50