3/4-(2/5+3/10)= 5/7+1/4—9/4= 3/4+3/6-5/8 = 5/9+(3/4-1/2)= 1/10+3/8-1/2= 3/5-(2/15)=
展开全部
3/4-(2/5+3/10)=
=3/4-(4/10+3/10)
=3/4-7/10
=15/20-14/20
=1/20
5/7+1/4—9/4
=5/7-2
=5/7-14/7
=-9/7
3/4+3/6-5/8
=18/24+12/24-15/24
=15/24
5/9+(3/4-1/2)
=20/36+27/36-18/36
=29/36
1/10+3/8-1/2
=4/10+15/40-20/40
=-1/40
3/5-(2/15)
=9/15-2/15
=7/15
=3/4-(4/10+3/10)
=3/4-7/10
=15/20-14/20
=1/20
5/7+1/4—9/4
=5/7-2
=5/7-14/7
=-9/7
3/4+3/6-5/8
=18/24+12/24-15/24
=15/24
5/9+(3/4-1/2)
=20/36+27/36-18/36
=29/36
1/10+3/8-1/2
=4/10+15/40-20/40
=-1/40
3/5-(2/15)
=9/15-2/15
=7/15
本回答被提问者采纳
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