998*997997-997*998998=

来源:学生作业帮助网 编辑:六六作业网 时间:2024/07/09 01:04:15
998*997997-997*998998=998*997997-997*998998=998*997997-997*998998=998*997997=996001006997*998998=996

998*997997-997*998998=
998*997997-997*998998=

998*997997-997*998998=
998*997997=996001006
997*998998=996001006
相减等于0
997*998998=(998-1)*(997997+1001)
=998*997997+998*1001-997997-1001
=998*997997+998998-998998
=998*997997
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