展开全部
解(1)
原式=26/5+3/4+5/6+7/12
=26/5+9/12+10/12+7/12
=26/5+13/6
=156/30+65/30
=221/30
解(2)
原式=3又8/11-10/27-9/11+9/5
=41/11-10/27-9/11+9/5
=(41/11-9/11)+9/5-10/27
=32/11+9/5-10/27
=4320/1485+2673/1485-550/1485
=4又503/1485
原式=26/5+3/4+5/6+7/12
=26/5+9/12+10/12+7/12
=26/5+13/6
=156/30+65/30
=221/30
解(2)
原式=3又8/11-10/27-9/11+9/5
=41/11-10/27-9/11+9/5
=(41/11-9/11)+9/5-10/27
=32/11+9/5-10/27
=4320/1485+2673/1485-550/1485
=4又503/1485
追问
我打错了，第二个式子应该是3又8/11-10/27-19/11+9/5
追答
你好：
3又8/11-10/27-19/11+9/5
=(3又8/11-19/11)-10/27+9/5
=(41/11-19/11)-10/27+9/5
=2-10/27+9/5
=44/27+9/5
=220/135+243/135
=463/135
本回答由提问者推荐
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
