[1/6-(5/14-1/3)]*7/9 简便运算
问题描述：
[1/6-(5/14-1/3)]*7/9 简便运算
答
[1/6-(5/14-1/3)]*7/9
=[1/6-5/14＋1/3)]*7/9
=【1/6＋1/3-5/14】×7/9
=[1/2-5/14]×7/9
=[1/7]×7/9
=1/9
答
[1/6-(5/14-1/3)]*7/9
=(1/6+1/3-5/14)*7/9
=(1/2-5/14)*7/9
=1/2*7/9-5/14*7/9
=7/18-5/18
=2/18
=1/9