987654321九位数中间加加减号等于10

msm

9-----8----7-----6-----5-----4----3----2-----1九位数中间加加减号等于10

wwfufw

会数学的都知道，此题无解。你这是在考大家智商么？

上官无忌

我承认我蛋疼了..

9+8+7+6+5+4+3+2+1 = 45
9+8+7+6+5+4+3+2-1 = 43
9+8+7+6+5+4+3-2+1 = 41
9+8+7+6+5+4+3-2-1 = 39
9+8+7+6+5+4-3+2+1 = 39
9+8+7+6+5+4-3+2-1 = 37
9+8+7+6+5+4-3-2+1 = 35
9+8+7+6+5+4-3-2-1 = 33
9+8+7+6+5-4+3+2+1 = 37
9+8+7+6+5-4+3+2-1 = 35
9+8+7+6+5-4+3-2+1 = 33
9+8+7+6+5-4+3-2-1 = 31
9+8+7+6+5-4-3+2+1 = 31
9+8+7+6+5-4-3+2-1 = 29
9+8+7+6+5-4-3-2+1 = 27
9+8+7+6+5-4-3-2-1 = 25
9+8+7+6-5+4+3+2+1 = 35
9+8+7+6-5+4+3+2-1 = 33
9+8+7+6-5+4+3-2+1 = 31
9+8+7+6-5+4+3-2-1 = 29
9+8+7+6-5+4-3+2+1 = 29
9+8+7+6-5+4-3+2-1 = 27
9+8+7+6-5+4-3-2+1 = 25
9+8+7+6-5+4-3-2-1 = 23
9+8+7+6-5-4+3+2+1 = 27
9+8+7+6-5-4+3+2-1 = 25
9+8+7+6-5-4+3-2+1 = 23
9+8+7+6-5-4+3-2-1 = 21
9+8+7+6-5-4-3+2+1 = 21
9+8+7+6-5-4-3+2-1 = 19
9+8+7+6-5-4-3-2+1 = 17
9+8+7+6-5-4-3-2-1 = 15
9+8+7-6+5+4+3+2+1 = 33
9+8+7-6+5+4+3+2-1 = 31
9+8+7-6+5+4+3-2+1 = 29
9+8+7-6+5+4+3-2-1 = 27
9+8+7-6+5+4-3+2+1 = 27
9+8+7-6+5+4-3+2-1 = 25
9+8+7-6+5+4-3-2+1 = 23
9+8+7-6+5+4-3-2-1 = 21
9+8+7-6+5-4+3+2+1 = 25
9+8+7-6+5-4+3+2-1 = 23
9+8+7-6+5-4+3-2+1 = 21
9+8+7-6+5-4+3-2-1 = 19
9+8+7-6+5-4-3+2+1 = 19
9+8+7-6+5-4-3+2-1 = 17
9+8+7-6+5-4-3-2+1 = 15
9+8+7-6+5-4-3-2-1 = 13
9+8+7-6-5+4+3+2+1 = 23
9+8+7-6-5+4+3+2-1 = 21
9+8+7-6-5+4+3-2+1 = 19
9+8+7-6-5+4+3-2-1 = 17
9+8+7-6-5+4-3+2+1 = 17
9+8+7-6-5+4-3+2-1 = 15
9+8+7-6-5+4-3-2+1 = 13
9+8+7-6-5+4-3-2-1 = 11
9+8+7-6-5-4+3+2+1 = 15
9+8+7-6-5-4+3+2-1 = 13
9+8+7-6-5-4+3-2+1 = 11
9+8+7-6-5-4+3-2-1 = 9
9+8+7-6-5-4-3+2+1 = 9
9+8+7-6-5-4-3+2-1 = 7
9+8+7-6-5-4-3-2+1 = 5
9+8+7-6-5-4-3-2-1 = 3
9+8-7+6+5+4+3+2+1 = 31
9+8-7+6+5+4+3+2-1 = 29
9+8-7+6+5+4+3-2+1 = 27
9+8-7+6+5+4+3-2-1 = 25
9+8-7+6+5+4-3+2+1 = 25
9+8-7+6+5+4-3+2-1 = 23
9+8-7+6+5+4-3-2+1 = 21
9+8-7+6+5+4-3-2-1 = 19
9+8-7+6+5-4+3+2+1 = 23
9+8-7+6+5-4+3+2-1 = 21
9+8-7+6+5-4+3-2+1 = 19
9+8-7+6+5-4+3-2-1 = 17
9+8-7+6+5-4-3+2+1 = 17
9+8-7+6+5-4-3+2-1 = 15
9+8-7+6+5-4-3-2+1 = 13
9+8-7+6+5-4-3-2-1 = 11
9+8-7+6-5+4+3+2+1 = 21
9+8-7+6-5+4+3+2-1 = 19
9+8-7+6-5+4+3-2+1 = 17
9+8-7+6-5+4+3-2-1 = 15
9+8-7+6-5+4-3+2+1 = 15
9+8-7+6-5+4-3+2-1 = 13
9+8-7+6-5+4-3-2+1 = 11
9+8-7+6-5+4-3-2-1 = 9
9+8-7+6-5-4+3+2+1 = 13
9+8-7+6-5-4+3+2-1 = 11
9+8-7+6-5-4+3-2+1 = 9
9+8-7+6-5-4+3-2-1 = 7
9+8-7+6-5-4-3+2+1 = 7
9+8-7+6-5-4-3+2-1 = 5
9+8-7+6-5-4-3-2+1 = 3
9+8-7+6-5-4-3-2-1 = 1
9+8-7-6+5+4+3+2+1 = 19
9+8-7-6+5+4+3+2-1 = 17
9+8-7-6+5+4+3-2+1 = 15
9+8-7-6+5+4+3-2-1 = 13
9+8-7-6+5+4-3+2+1 = 13
9+8-7-6+5+4-3+2-1 = 11
9+8-7-6+5+4-3-2+1 = 9
9+8-7-6+5+4-3-2-1 = 7
9+8-7-6+5-4+3+2+1 = 11
9+8-7-6+5-4+3+2-1 = 9
9+8-7-6+5-4+3-2+1 = 7
9+8-7-6+5-4+3-2-1 = 5
9+8-7-6+5-4-3+2+1 = 5
9+8-7-6+5-4-3+2-1 = 3
9+8-7-6+5-4-3-2+1 = 1
9+8-7-6+5-4-3-2-1 = -1
9+8-7-6-5+4+3+2+1 = 9
9+8-7-6-5+4+3+2-1 = 7
9+8-7-6-5+4+3-2+1 = 5
9+8-7-6-5+4+3-2-1 = 3
9+8-7-6-5+4-3+2+1 = 3
9+8-7-6-5+4-3+2-1 = 1
9+8-7-6-5+4-3-2+1 = -1
9+8-7-6-5+4-3-2-1 = -3
9+8-7-6-5-4+3+2+1 = 1
9+8-7-6-5-4+3+2-1 = -1
9+8-7-6-5-4+3-2+1 = -3
9+8-7-6-5-4+3-2-1 = -5
9+8-7-6-5-4-3+2+1 = -5
9+8-7-6-5-4-3+2-1 = -7
9+8-7-6-5-4-3-2+1 = -9
9+8-7-6-5-4-3-2-1 = -11
9-8+7+6+5+4+3+2+1 = 29
9-8+7+6+5+4+3+2-1 = 27
9-8+7+6+5+4+3-2+1 = 25
9-8+7+6+5+4+3-2-1 = 23
9-8+7+6+5+4-3+2+1 = 23
9-8+7+6+5+4-3+2-1 = 21
9-8+7+6+5+4-3-2+1 = 19
9-8+7+6+5+4-3-2-1 = 17
9-8+7+6+5-4+3+2+1 = 21
9-8+7+6+5-4+3+2-1 = 19
9-8+7+6+5-4+3-2+1 = 17
9-8+7+6+5-4+3-2-1 = 15
9-8+7+6+5-4-3+2+1 = 15
9-8+7+6+5-4-3+2-1 = 13
9-8+7+6+5-4-3-2+1 = 11
9-8+7+6+5-4-3-2-1 = 9
9-8+7+6-5+4+3+2+1 = 19
9-8+7+6-5+4+3+2-1 = 17
9-8+7+6-5+4+3-2+1 = 15
9-8+7+6-5+4+3-2-1 = 13
9-8+7+6-5+4-3+2+1 = 13
9-8+7+6-5+4-3+2-1 = 11
9-8+7+6-5+4-3-2+1 = 9
9-8+7+6-5+4-3-2-1 = 7
9-8+7+6-5-4+3+2+1 = 11
9-8+7+6-5-4+3+2-1 = 9
9-8+7+6-5-4+3-2+1 = 7
9-8+7+6-5-4+3-2-1 = 5
9-8+7+6-5-4-3+2+1 = 5
9-8+7+6-5-4-3+2-1 = 3
9-8+7+6-5-4-3-2+1 = 1
9-8+7+6-5-4-3-2-1 = -1
9-8+7-6+5+4+3+2+1 = 17
9-8+7-6+5+4+3+2-1 = 15
9-8+7-6+5+4+3-2+1 = 13
9-8+7-6+5+4+3-2-1 = 11
9-8+7-6+5+4-3+2+1 = 11
9-8+7-6+5+4-3+2-1 = 9
9-8+7-6+5+4-3-2+1 = 7
9-8+7-6+5+4-3-2-1 = 5
9-8+7-6+5-4+3+2+1 = 9
9-8+7-6+5-4+3+2-1 = 7
9-8+7-6+5-4+3-2+1 = 5
9-8+7-6+5-4+3-2-1 = 3
9-8+7-6+5-4-3+2+1 = 3
9-8+7-6+5-4-3+2-1 = 1
9-8+7-6+5-4-3-2+1 = -1
9-8+7-6+5-4-3-2-1 = -3
9-8+7-6-5+4+3+2+1 = 7
9-8+7-6-5+4+3+2-1 = 5
9-8+7-6-5+4+3-2+1 = 3
9-8+7-6-5+4+3-2-1 = 1
9-8+7-6-5+4-3+2+1 = 1
9-8+7-6-5+4-3+2-1 = -1
9-8+7-6-5+4-3-2+1 = -3
9-8+7-6-5+4-3-2-1 = -5
9-8+7-6-5-4+3+2+1 = -1
9-8+7-6-5-4+3+2-1 = -3
9-8+7-6-5-4+3-2+1 = -5
9-8+7-6-5-4+3-2-1 = -7
9-8+7-6-5-4-3+2+1 = -7
9-8+7-6-5-4-3+2-1 = -9
9-8+7-6-5-4-3-2+1 = -11
9-8+7-6-5-4-3-2-1 = -13
9-8-7+6+5+4+3+2+1 = 15
9-8-7+6+5+4+3+2-1 = 13
9-8-7+6+5+4+3-2+1 = 11
9-8-7+6+5+4+3-2-1 = 9
9-8-7+6+5+4-3+2+1 = 9
9-8-7+6+5+4-3+2-1 = 7
9-8-7+6+5+4-3-2+1 = 5
9-8-7+6+5+4-3-2-1 = 3
9-8-7+6+5-4+3+2+1 = 7
9-8-7+6+5-4+3+2-1 = 5
9-8-7+6+5-4+3-2+1 = 3
9-8-7+6+5-4+3-2-1 = 1
9-8-7+6+5-4-3+2+1 = 1
9-8-7+6+5-4-3+2-1 = -1
9-8-7+6+5-4-3-2+1 = -3
9-8-7+6+5-4-3-2-1 = -5
9-8-7+6-5+4+3+2+1 = 5
9-8-7+6-5+4+3+2-1 = 3
9-8-7+6-5+4+3-2+1 = 1
9-8-7+6-5+4+3-2-1 = -1
9-8-7+6-5+4-3+2+1 = -1
9-8-7+6-5+4-3+2-1 = -3
9-8-7+6-5+4-3-2+1 = -5
9-8-7+6-5+4-3-2-1 = -7
9-8-7+6-5-4+3+2+1 = -3
9-8-7+6-5-4+3+2-1 = -5
9-8-7+6-5-4+3-2+1 = -7
9-8-7+6-5-4+3-2-1 = -9
9-8-7+6-5-4-3+2+1 = -9
9-8-7+6-5-4-3+2-1 = -11
9-8-7+6-5-4-3-2+1 = -13
9-8-7+6-5-4-3-2-1 = -15
9-8-7-6+5+4+3+2+1 = 3
9-8-7-6+5+4+3+2-1 = 1
9-8-7-6+5+4+3-2+1 = -1
9-8-7-6+5+4+3-2-1 = -3
9-8-7-6+5+4-3+2+1 = -3
9-8-7-6+5+4-3+2-1 = -5
9-8-7-6+5+4-3-2+1 = -7
9-8-7-6+5+4-3-2-1 = -9
9-8-7-6+5-4+3+2+1 = -5
9-8-7-6+5-4+3+2-1 = -7
9-8-7-6+5-4+3-2+1 = -9
9-8-7-6+5-4+3-2-1 = -11
9-8-7-6+5-4-3+2+1 = -11
9-8-7-6+5-4-3+2-1 = -13
9-8-7-6+5-4-3-2+1 = -15
9-8-7-6+5-4-3-2-1 = -17
9-8-7-6-5+4+3+2+1 = -7
9-8-7-6-5+4+3+2-1 = -9
9-8-7-6-5+4+3-2+1 = -11
9-8-7-6-5+4+3-2-1 = -13
9-8-7-6-5+4-3+2+1 = -13
9-8-7-6-5+4-3+2-1 = -15
9-8-7-6-5+4-3-2+1 = -17
9-8-7-6-5+4-3-2-1 = -19
9-8-7-6-5-4+3+2+1 = -15
9-8-7-6-5-4+3+2-1 = -17
9-8-7-6-5-4+3-2+1 = -19
9-8-7-6-5-4+3-2-1 = -21
9-8-7-6-5-4-3+2+1 = -21
9-8-7-6-5-4-3+2-1 = -23
9-8-7-6-5-4-3-2+1 = -25
9-8-7-6-5-4-3-2-1 = -27

msm

对不住大家，孩子学校4年级的寒假题，我也算了3个多小时

憨吃迷糊睡

9 - 8 - 76 + 54 + 32 - 1 = 10

迷糊也放寒假了，呵呵，不知道现在的回复是否还有意义

如果老师说不对，也要告诉孩子，其实一道题有很多种解法，不必要拘泥于答案，关键在于如何思维

憨吃迷糊睡

根据题目不允许使用括号，用JAVA程序遍历了所有情况，得出只有下面四种可能的答案

9+8-76+5+43+21=10
9-8-7-6-5-4+32-1=10
9-8-76+54+32-1=10
98-7+6-54-32-1=10

完整的程序放在技术交流版的谷歌代码库里了，感兴趣的版友可以参考
如果发现问题请和迷糊联系

代码保存场所：http://code.google.com/p/xiaochu ... _To_10.zip&can=2&q=

下午迷糊给出的答案是用脑袋想出来的
如果楼主回复的话，迷糊将详细解释如何给四年级的小童鞋说明清楚，让他/她能够理解的方法解题