5*6*7*8分之5*6*7*8-2*3*4*5 简算
问题描述:
5*6*7*8分之5*6*7*8-2*3*4*5 简算
答
(5*6*7*8-2*3*4*5)/5*6*7*8
=5*6*7*8/5*6*7*8-2*3*4*5/5*6*7*8
=1-1/14
=13/14