276+(543×275)/(276×543
该题应该是(276+(543×275))/(276×543-267)吧 如果是这样的话 (276+(543×275))/(276×543-267) =(276+(543×275))/((275+1)×543-267) =(276+(543×275))/(275×543+543-267) =(276+(543×275))/(275×543+276) =1