如题所述
76×(1/23-1/53)+23×(1/53+1/76)-53×(1/23-1/76)=76×1/23-76×1/53+23×1/53+23×1/76-53×1/23-53×1/76=(76/23-53/23)-(76/53-23/53)+(23/76+53/76)=23/23-53/53+75/76=1-1+1=1
是吗
是