4/15/(9/5-2/3*5/6)+5/6 怎么简便运算

问题描述:

4/15/(9/5-2/3*5/6)+5/6 怎么简便运算

=4/[15*(5/9-2/3*5/6)]+5/6
=4/[27-25/3]+5/6
=4/[56/3]+5/6
=2/7+5/6
=47/42