76×(1/53-1/23)-53×(1/76-1/23)-23×(1/53+1/76) 运用简便运算

问题描述:

76×(1/53-1/23)-53×(1/76-1/23)-23×(1/53+1/76) 运用简便运算

76×(1/53-1/23)-53×(1/76-1/23)-23×(1/53+1/76)
=76/53-76/23-53/76+53/23-23/53-23/76
=(76/53-23/53)-(76/23-53/23)-(53/76+23/76)
=1-1-1
=-1