1-2/5+3/7 7/10-(1/2-1/3) 11/12-(3/4-7/30) 这些都是简算
1个回答
展开全部
1-2/5+3/7
=3/5+3/7
=3×（1/5+1/7）
=3×12/35
=36/35
7/10-(1/2-1/3)
=7/10-1/2+1/3
=1/5-1/3
=2/15
11/12-(3/4-7/30)
=11/12-3/4+7/30
=1/6+7/30
=2/5
=3/5+3/7
=3×（1/5+1/7）
=3×12/35
=36/35
7/10-(1/2-1/3)
=7/10-1/2+1/3
=1/5-1/3
=2/15
11/12-(3/4-7/30)
=11/12-3/4+7/30
=1/6+7/30
=2/5
更多追问追答
追问
1-2/5+3/7
=1-2/5+3/7
=5/5-5/2+3/7
=3/5+3/6
=36/35
这样简算可以吗
追答
1-2/5+3/7
=1-2/5+3/7
=5/5-5/2+3/7
=3/5+3/6
=36/35
3/5+3/6=36/35？？？
错误啊
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
