(-36)x(-9/5)x5/6x(-3)

问题描述:

(-36)x(-9/5)x5/6x(-3)
怎么写?
还有
(1/6-1/5+2/15+1/30)x30

(-36)x(-9/5)x5/6x(-3)
=-18
就约分啊...
(1/6-1/5+2/15+1/30)x30
=5-6+4+1
=4