(987+4079×986）÷（987×4097-3110） 简便计算,
问题描述：
(987+4079×986）÷（987×4097-3110） 简便计算,
答
(987+4079*986)/(987*4097-3110)=(987+4079*986)/(986*4097+4097-3110)
=(987+4079*986)/(4097*986+987)=(1+4080*986)/(1+4098*986)
=(986/986+4080*986*986/986)/(986/986+4098*986*986/986)
=(4080*987)/(4098*987)=4080/4098