发布网友
共3个回答
热心网友
379-297=(300+79)-297=300-297+79=3+79=82
379-297=379-(300-3)=379-300+3=79+3=82
379-297=(379+3)-(297+3)=382-300=82
379-297=(370+9)-(290+7)=(370-290)+(9-7)=80+2=82
热心网友
379-297
=379-(300-3)
=379-300+3
=79+3
=82
热心网友
=379-(300-3)
=379-300+3
=79+3
=82