(7/11+8/15)-(7/11-7/15)脱式计算
问题描述：
(7/11+8/15)-(7/11-7/15)脱式计算
(7/11+8/15)-(7/11-7/15)写过程,脱式计算,能简算的要简算
7/30+3/8+23/30-4/8
答
(7/11+8/15)-(7/11-7/15)
=7/11+8/15-7/11+7/15
=7/11-7/11+8/15+7/15
=(7/11-7/11)+(8/15+7/15)
=0+1
=1
7/30+3/8+23/30-4/8
=7/30+23/30 +3/8-4/8
=1-1/8
=7/8