[2又1/27-(7/9-11/12+1/6)*36]*0.25= *是乘

问题描述:

[2又1/27-(7/9-11/12+1/6)*36]*0.25= *是乘

原式=【2又1/27-(7/9*36-11/12*36+1/6*36)】*0.25
=(2又1/27-28+33-6)*0.25
=1又1/27*0.25
=28/25*0.25
=28/27*(1/4)
=7/27