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Transformati expresiile folosind proprietatile inmultirii sau impartirii,apoi calculati;(204+488):4=?,(28+17)*5=?,(1260-660)/6=?,2*(4500-750)=?,440/4+560/4=?,123*4+97*4=?,500/20-260/20=?,8*412-8*310.Dau coroana varog urgent.