7/18*1/4+3/4÷18/7 简便运算

问题描述:

7/18*1/4+3/4÷18/7 简便运算

7/18*1/4+3/4÷18/7
=7/18*1/4+3/4*7/18
=7/18*(1/4+3/4)
=7/18*4
=7/18