〔-98〕+〔-998〕+〔-9998〕=

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/05 20:34:48

〔-98〕+〔-998〕+〔-9998〕=
〔-98〕+〔-998〕+〔-9998〕=

〔-98〕+〔-998〕+〔-9998〕=
(-100+2)+(-1000+2)+(-10000+2)
=(-100)+(-1000)+(-10000)+2+2+2
=-11100+6
=-11094

原式=-100-1000-10000+6=-11100+6=-11094

-100+2-1000+2-9998+2

解:原式=-(98+998+9998)
=-(98+2+998+2+9998-4)
=-(1100+9994)
=-11094

简便方法
-98-998-9998
=-(100-2)-(1000-2)-(10000-2)
=-11100+6
=11094