(-7)+(-12)-6+18=......... 25+(-16)-(-12)-3=......... rozszerzenie prosze to na jutro i daje naj

(-7)+(-12)-6+18=-19-6+18=-25+18=-7 25+(-16)-(-12)-3=9-(-16)-(-12)=25-(-12)=37

-7+-12-6+18=-7 25+-16--12-3=25-(+i-to-)16+(- i - to+)12-3=18