a减3分之1a乘4分之1
问题描述:
a减3分之1a乘4分之1
答
a-1/3*a*1/4
=a-1/12*a
=(1-1/12)a
=11a/12
a减3分之1a乘4分之1
a-1/3*a*1/4
=a-1/12*a
=(1-1/12)a
=11a/12