(38乘4分之1+17乘4分之1)除以4分之5简便算法

1/(8又(1/4)-(8.5-4-(4*(1又(7/8))))
=1/(33/4-(4.5-(4*15/8)))
=1/(33/4-(4.5-60/8))
=1/(33/4-(36-60)/8)
=1/(33/4-(-24/8))
=1/(33/4+3)
=1/((33+12)/4)
=1/(45/4)
=4/45
再问： 好麻烦.. 能再想么？
再答： 哦，我想想