简算.5/3-(15/2+3/1)

问题描述:

简算.5/3-(15/2+3/1)
5/3-(15/2+3/1)
=
=

5/3-(15/2+3/1)
=3/5-(2/15+5/15)
=3/5-7/15
=9/15-7/15
=2/15