0.75*14又9分之1+4分之3*1又9分之8-12*75%

问题描述:

0.75*14又9分之1+4分之3*1又9分之8-12*75%

0.75*14又9分之1+4分之3*1又9分之8-12*75%
=0.75*14又9分之1+0.75*1又9分之8-12*0.75
=0.75*(14又9分之1+1又9分之8-12)
=0.75*4
=3