4分之15成(6分之5加4分之3)加5分之4
=15/4*(5/6+3/4)+4/5
=15/4*19/12+4/5
=15*19/(4*12)+4/5
=95/16+4/5
=(475+64)/80
=539/80
4分之15成(6分之5加4分之3)加5分之4等于
4分之15成(6分之5加4分之3)加5分之4
=15/4*(5/6+3/4)+4/5
=15/4*19/12+4/5
=15*19/(4*12)+4/5
=95/16+4/5
=(475+64)/80
=539/80