3/4*1/9+1/4/9 简便运算

问题描述:

3/4*1/9+1/4/9 简便运算

3/4*1/9+1/4/9
=3/4*1/9+1/4*1/9
=(3/4+1/4)*1/9
=1*1/9
=1/9