(362+548*361)/(362*548-186)(204+584*1991)/(1992*584-380)-1/143
问题描述:
(362+548*361)/(362*548-186)
(204+584*1991)/(1992*584-380)-1/143
答
(362+548*361)/(362*548-186)
=(362+548*361)/(361*548+548-186)
=(362+548*361)/(362+548*361)
=1
(204+584*1991)/(1992*584-380)-1/143
=(204+584*1991)/(1991*584+584-380)-1/143
= 1-1/143
=142/143