(2/3+1/5)+(2/3-12/17)-(1/5+5/17)怎么简算
问题描述：
(2/3+1/5)+(2/3-12/17)-(1/5+5/17)怎么简算
答
(2/3+1/5)+(2/3-12/17)-(1/5+5/17)
=2/3+1/5+2/3-12/17-1/5-5/17
=(2/3+2/3)+(1/5-1/5)-)12/17+5/17)
=4/3+0-1
=1/3