(51分之1-87分之2)/29分之1+22/51怎样简便
问题描述：
(51分之1-87分之2)/29分之1+22/51怎样简便
答
(1/51-2/87)/(1/29)+22/51
=(1/51-2/87)*29+22/51
=29/51-58/87+22/51
=51/51-58/87
=1-58/87
=29/87
=1/3