1樓:
肯定不是常規題
數學意義上無解
2樓:匿名使用者
沒括號不行吧
(5+5+5)÷5=3
5□5□5□5□5=0 □裡添+,-,×,÷ 不許加括號,符號可從重複
3樓:匿名使用者
可能的情況為:
5+5+5+5+5 = 25
5+5+5+5-5 = 15
5+5+5+5×5 = 40
5+5+5+5÷5 = 16
5+5+5-5+5 = 15
5+5+5-5-5 = 5
5+5+5-5×5 = -105+5+5-5÷5 = 14
5+5+5×5+5 = 40
5+5+5×5-5 = 30
5+5+5×5×5 = 1355+5+5×5÷5 = 15
5+5+5÷5+5 = 16
5+5+5÷5-5 = 6
5+5+5÷5×5 = 15
5+5+5÷5÷5 = 10 1/55+5-5+5+5 = 15
5+5-5+5-5 = 5
5+5-5+5×5 = 30
5+5-5+5÷5 = 6
5+5-5-5+5 = 5
5+5-5-5-5 = -5
5+5-5-5×5 = -205+5-5-5÷5 = 4
5+5-5×5+5 = -105+5-5×5-5 = -205+5-5×5×5 = -1155+5-5×5÷5 = 5
5+5-5÷5+5 = 14
5+5-5÷5-5 = 4
5+5-5÷5×5 = 5
5+5-5÷5÷5 = 9 4/55+5×5+5+5 = 40
5+5×5+5-5 = 30
5+5×5+5×5 = 55
5+5×5+5÷5 = 31
5+5×5-5+5 = 30
5+5×5-5-5 = 20
5+5×5-5×5 = 5
5+5×5-5÷5 = 29
5+5×5×5+5 = 1355+5×5×5-5 = 1255+5×5×5×5 = 6305+5×5×5÷5 = 30
5+5×5÷5+5 = 15
5+5×5÷5-5 = 5
5+5×5÷5×5 = 30
5+5×5÷5÷5 = 6
5+5÷5+5+5 = 16
5+5÷5+5-5 = 6
5+5÷5+5×5 = 31
5+5÷5+5÷5 = 7
5+5÷5-5+5 = 6
5+5÷5-5-5 = -4
5+5÷5-5×5 = -195+5÷5-5÷5 = 5
5+5÷5×5+5 = 15
5+5÷5×5-5 = 5
5+5÷5×5×5 = 30
5+5÷5×5÷5 = 6
5+5÷5÷5+5 = 10 1/55+5÷5÷5-5 = 1/55+5÷5÷5×5 = 6
5+5÷5÷5÷5 = 5 1/255-5+5+5+5 = 15
5-5+5+5-5 = 5
5-5+5+5×5 = 30
5-5+5+5÷5 = 6
5-5+5-5+5 = 5
5-5+5-5-5 = -5
5-5+5-5×5 = -205-5+5-5÷5 = 4
5-5+5×5+5 = 30
5-5+5×5-5 = 20
5-5+5×5×5 = 1255-5+5×5÷5 = 5
5-5+5÷5+5 = 6
5-5+5÷5-5 = -4
5-5+5÷5×5 = 5
5-5+5÷5÷5 = 1/55-5-5+5+5 = 5
5-5-5+5-5 = -5
5-5-5+5×5 = 20
5-5-5+5÷5 = -4
5-5-5-5+5 = -5
5-5-5-5-5 = -155-5-5-5×5 = -305-5-5-5÷5 = -6
5-5-5×5+5 = -205-5-5×5-5 = -305-5-5×5×5 = -1255-5-5×5÷5 = -5
5-5-5÷5+5 = 4
5-5-5÷5-5 = -6
5-5-5÷5×5 = -5
5-5-5÷5÷5 = - 1/55-5×5+5+5 = -105-5×5+5-5 = -205-5×5+5×5 = 5
5-5×5+5÷5 = -195-5×5-5+5 = -205-5×5-5-5 = -305-5×5-5×5 = -455-5×5-5÷5 = -215-5×5×5+5 = -1155-5×5×5-5 = -1255-5×5×5×5 = -6205-5×5×5÷5 = -205-5×5÷5+5 = 5
5-5×5÷5-5 = -5
5-5×5÷5×5 = -205-5×5÷5÷5 = 4
5-5÷5+5+5 = 14
5-5÷5+5-5 = 4
5-5÷5+5×5 = 29
5-5÷5+5÷5 = 5
5-5÷5-5+5 = 4
5-5÷5-5-5 = -6
5-5÷5-5×5 = -215-5÷5-5÷5 = 3
5-5÷5×5+5 = 5
5-5÷5×5-5 = -5
5-5÷5×5×5 = -205-5÷5×5÷5 = 4
5-5÷5÷5+5 = 9 4/55-5÷5÷5-5 = - 1/55-5÷5÷5×5 = 4
5-5÷5÷5÷5 = 4 24/255×5+5+5+5 = 40
5×5+5+5-5 = 30
5×5+5+5×5 = 55
5×5+5+5÷5 = 31
5×5+5-5+5 = 30
5×5+5-5-5 = 20
5×5+5-5×5 = 5
5×5+5-5÷5 = 29
5×5+5×5+5 = 55
5×5+5×5-5 = 45
5×5+5×5×5 = 1505×5+5×5÷5 = 30
5×5+5÷5+5 = 31
5×5+5÷5-5 = 21
5×5+5÷5×5 = 30
5×5+5÷5÷5 = 25 1/55×5-5+5+5 = 30
5×5-5+5-5 = 20
5×5-5+5×5 = 45
5×5-5+5÷5 = 21
5×5-5-5+5 = 20
5×5-5-5-5 = 10
5×5-5-5×5 = -5
5×5-5-5÷5 = 19
5×5-5×5+5 = 5
5×5-5×5-5 = -5
5×5-5×5×5 = -1005×5-5×5÷5 = 20
5×5-5÷5+5 = 29
5×5-5÷5-5 = 19
5×5-5÷5×5 = 20
5×5-5÷5÷5 = 24 4/55×5×5+5+5 = 1355×5×5+5-5 = 1255×5×5+5×5 = 1505×5×5+5÷5 = 1265×5×5-5+5 = 1255×5×5-5-5 = 1155×5×5-5×5 = 1005×5×5-5÷5 = 1245×5×5×5+5 = 6305×5×5×5-5 = 6205×5×5×5×5 = 31255×5×5×5÷5 = 1255×5×5÷5+5 = 30
5×5×5÷5-5 = 20
5×5×5÷5×5 = 1255×5×5÷5÷5 = 5
5×5÷5+5+5 = 15
5×5÷5+5-5 = 5
5×5÷5+5×5 = 30
5×5÷5+5÷5 = 6
5×5÷5-5+5 = 5
5×5÷5-5-5 = -5
5×5÷5-5×5 = -205×5÷5-5÷5 = 4
5×5÷5×5+5 = 30
5×5÷5×5-5 = 20
5×5÷5×5×5 = 1255×5÷5×5÷5 = 5
5×5÷5÷5+5 = 6
5×5÷5÷5-5 = -4
5×5÷5÷5×5 = 5
5×5÷5÷5÷5 = 1/55÷5+5+5+5 = 16
5÷5+5+5-5 = 6
5÷5+5+5×5 = 31
5÷5+5+5÷5 = 7
5÷5+5-5+5 = 6
5÷5+5-5-5 = -4
5÷5+5-5×5 = -195÷5+5-5÷5 = 5
5÷5+5×5+5 = 31
5÷5+5×5-5 = 21
5÷5+5×5×5 = 1265÷5+5×5÷5 = 6
5÷5+5÷5+5 = 7
5÷5+5÷5-5 = -3
5÷5+5÷5×5 = 6
5÷5+5÷5÷5 = 1 1/55÷5-5+5+5 = 6
5÷5-5+5-5 = -4
5÷5-5+5×5 = 21
5÷5-5+5÷5 = -3
5÷5-5-5+5 = -4
5÷5-5-5-5 = -145÷5-5-5×5 = -295÷5-5-5÷5 = -5
5÷5-5×5+5 = -195÷5-5×5-5 = -295÷5-5×5×5 = -1245÷5-5×5÷5 = -4
5÷5-5÷5+5 = 5
5÷5-5÷5-5 = -5
5÷5-5÷5×5 = -4
5÷5-5÷5÷5 = 4/55÷5×5+5+5 = 15
5÷5×5+5-5 = 5
5÷5×5+5×5 = 30
5÷5×5+5÷5 = 6
5÷5×5-5+5 = 5
5÷5×5-5-5 = -5
5÷5×5-5×5 = -205÷5×5-5÷5 = 4
5÷5×5×5+5 = 30
5÷5×5×5-5 = 20
5÷5×5×5×5 = 1255÷5×5×5÷5 = 5
5÷5×5÷5+5 = 6
5÷5×5÷5-5 = -4
5÷5×5÷5×5 = 5
5÷5×5÷5÷5 = 1/55÷5÷5+5+5 = 10 1/55÷5÷5+5-5 = 1/55÷5÷5+5×5 = 25 1/55÷5÷5+5÷5 = 1 1/55÷5÷5-5+5 = 1/55÷5÷5-5-5 = -9 4/55÷5÷5-5×5 = -24 4/55÷5÷5-5÷5 = - 4/55÷5÷5×5+5 = 6
5÷5÷5×5-5 = -4
5÷5÷5×5×5 = 5
5÷5÷5×5÷5 = 1/55÷5÷5÷5+5 = 5 1/255÷5÷5÷5-5 = -4 24/255÷5÷5÷5×5 = 1/55÷5÷5÷5÷5 = 1/125抱歉,沒有想要的結果0.
123 4 5 6 7 8 100中間填什麼符號
123 45 67 8 9 100 1 2 3 4 5 6 7 8 9 1001 2 3 4 5 6 7 8 9 100 1 2 3 4 5 6 7 8 9 1001 2 3 4 5 6 7 8 9 1001 2 3 4 5 6 7 8 9 100 1 2 3 4 5 6 7 8 9 1001 2 ...
54321中間填加減乘除等於54321中間填加減乘除等於6？
數學5個3中間加上加減乘除符號各一次結果等於6。3 3 3 3 3 9 3 3 3 27 3 3 9 3 6所以答案內為 3 3 3 3 3 6。例如 5 4 3 2 1 2 5 4 3 2 1 2 5 4 3 2 1 2 如果可以改容 變54321的順序 4 3 5 2 1 2 4 3 5 2 1...
1 2 32019中間新增或減最後等於零
答 這道題是一道簡單題。不要把他複雜化。道理非常簡單，等差數列的項數必須是偶數，也就是說an的n必須是偶數。你這是奇數項，做不到。依據是 an a1 a n 1 a2 a n 2 a3 a n 2 1 a n 2 1 如果是奇數，就剩乙個a n 2 那麼，n是奇數時，答案是a n 2 就成立。像這種...