5/9-1/4-2/9+2/7,怎么算？
4个回答
展开全部
5/9-1/4-2/9+2/7
=5/9-2/9-1/4+2/7
=3/9-1/4+2/7
=1/3-1/4+2/7
=4/12-3/12+2/7
=1/12+2/7
=7/84+24/84
=31/84
步骤如上！希望采纳！
=5/9-2/9-1/4+2/7
=3/9-1/4+2/7
=1/3-1/4+2/7
=4/12-3/12+2/7
=1/12+2/7
=7/84+24/84
=31/84
步骤如上！希望采纳！
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
展开全部
5/9-1/4-2/9+2/7
=140/252-63/252-56/252+72/252
=77/252-56/252+72/252
=21/252+72/252
=93/252
=31/84
答案：31/84
=140/252-63/252-56/252+72/252
=77/252-56/252+72/252
=21/252+72/252
=93/252
=31/84
答案：31/84
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
展开全部
5/9-1/4-2/9+2/7
=(5/9-2/9)-1/4+2/7
=1/3-1/4+2/7
=1/12+2/7
=(7+24)/84
=31/84
=(5/9-2/9)-1/4+2/7
=1/3-1/4+2/7
=1/12+2/7
=(7+24)/84
=31/84
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
展开全部
5/9-1/4-2/9+2/7
=5/9-2/9-1/4+2/7
=3/9-1/4+2/7
=1/3-1/4+2/7
=4/12-3/12+2/7
=1/12+2/7
7/84+24/84
=31/84
=5/9-2/9-1/4+2/7
=3/9-1/4+2/7
=1/3-1/4+2/7
=4/12-3/12+2/7
=1/12+2/7
7/84+24/84
=31/84
已赞过
已踩过<
评论
收起
你对这个回答的评价是？
更多回答（2）
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
