用有理数2;-5;7;-13算24点每个数字只能用一次,进行加减乘除四则运算.

用有理数2;-5;7;-13算24点每个数字只能用一次,进行加减乘除四则运算.
用有理数2;-5;7;-13算24点
每个数字只能用一次,进行加减乘除四则运算.

用有理数2;-5;7;-13算24点每个数字只能用一次,进行加减乘除四则运算.
-（-5+7）-（2*（-13））=24

1: 2 + 5 × 7 - 13
2: (2 + 5 × 7) - 13
3: (2 + (5 × 7)) - 13
4: 2 + (5 × 7) - 13
5: 2 + (5 × 7 - 13)
6: 2 + ((5 × 7) - 13)
7: 2 + 7 × 5 - 13
8: (2 + 7 × 5) - 13
...

全部展开

1: 2 + 5 × 7 - 13
2: (2 + 5 × 7) - 13
3: (2 + (5 × 7)) - 13
4: 2 + (5 × 7) - 13
5: 2 + (5 × 7 - 13)
6: 2 + ((5 × 7) - 13)
7: 2 + 7 × 5 - 13
8: (2 + 7 × 5) - 13
9: (2 + (7 × 5)) - 13
10: 2 + (7 × 5) - 13
11: 2 + (7 × 5 - 13)
12: 2 + ((7 × 5) - 13)
13: 2 - 13 + 5 × 7
14: (2 - 13) + 5 × 7
15: 2 - 13 +(5 × 7)
16: (2 - 13) + (5 × 7)
17: 2 - (13 - 5 × 7)
18: 2 - (13 - (5 × 7))
19: 2 × 13 + 5 - 7
20: (2 × 13) + 5 - 7
21: (2 × 13 + 5) - 7
22: ((2 × 13) + 5) - 7
23: 2 × 13 +(5 - 7)
24: (2 × 13) + (5 - 7)
25: 2 - 13 + 7 × 5
26: (2 - 13) + 7 × 5
27: 2 - 13 +(7 × 5)
28: (2 - 13) + (7 × 5)
29: 2 - (13 - 7 × 5)
30: 2 - (13 - (7 × 5))
31: 2 × 13 - 7 + 5
32: (2 × 13) - 7 + 5
33: (2 × 13 - 7) + 5
34: ((2 × 13) - 7) + 5
35: 2 × 13 -(7 - 5)
36: (2 × 13) - (7 - 5)
37: 5 + 2 × 13 - 7
38: (5 + 2 × 13) - 7
39: (5 + (2 × 13)) - 7
40: 5 + (2 × 13) - 7
41: 5 + (2 × 13 - 7)
42: 5 + ((2 × 13) - 7)
43: 5 - 7 + 2 × 13
44: (5 - 7) + 2 × 13
45: 5 - 7 +(2 × 13)
46: (5 - 7) + (2 × 13)
47: 5 - (7 - 2 × 13)
48: 5 - (7 - (2 × 13))
49: 5 × 7 + 2 - 13
50: (5 × 7) + 2 - 13
51: (5 × 7 + 2) - 13
52: ((5 × 7) + 2) - 13
53: 5 × 7 +(2 - 13)
54: (5 × 7) + (2 - 13)
55: 5 - 7 + 13 × 2
56: (5 - 7) + 13 × 2
57: 5 - 7 +(13 × 2)
58: (5 - 7) + (13 × 2)
59: 5 - (7 - 13 × 2)
60: 5 - (7 - (13 × 2))
61: (5 × 7 + 13) ÷ 2
62: ((5 × 7) + 13) ÷ 2
63: 5 × 7 - 13 + 2
64: (5 × 7) - 13 + 2
65: (5 × 7 - 13) + 2
66: ((5 × 7) - 13) + 2
67: 5 × 7 -(13 - 2)
68: (5 × 7) - (13 - 2)
69: 5 + 13 × 2 - 7
70: (5 + 13 × 2) - 7
71: (5 + (13 × 2)) - 7
72: 5 + (13 × 2) - 7
73: 5 + (13 × 2 - 7)
74: 5 + ((13 × 2) - 7)
75: 7 × 5 + 2 - 13
76: (7 × 5) + 2 - 13
77: (7 × 5 + 2) - 13
78: ((7 × 5) + 2) - 13
79: 7 × 5 +(2 - 13)
80: (7 × 5) + (2 - 13)
81: (7 - 5) × 13 - 2
82: ((7 - 5) × 13) - 2
83: (7 × 5 + 13) ÷ 2
84: ((7 × 5) + 13) ÷ 2
85: 7 × 5 - 13 + 2
86: (7 × 5) - 13 + 2
87: (7 × 5 - 13) + 2
88: ((7 × 5) - 13) + 2
89: 7 × 5 -(13 - 2)
90: (7 × 5) - (13 - 2)
91: 13 × 2 + 5 - 7
92: (13 × 2) + 5 - 7
93: (13 × 2 + 5) - 7
94: ((13 × 2) + 5) - 7
95: 13 × 2 +(5 - 7)
96: (13 × 2) + (5 - 7)
97: 13 × 2 - 7 + 5
98: (13 × 2) - 7 + 5
99: (13 × 2 - 7) + 5
100: ((13 × 2) - 7) + 5
101: 13 × 2 -(7 - 5)
102: (13 × 2) - (7 - 5)
103: (13 + 5 × 7) ÷ 2
104: (13 + (5 × 7)) ÷ 2
105: (13 + 7 × 5) ÷ 2
106: (13 + (7 × 5)) ÷ 2
107: (13 × (7 - 5)) - 2
108: 13 × (7 - 5) - 2

收起

2 + 5 × 7 - 13=24
分数一定要给我哦！谢了

-（-5+7）-（2*（-13））=24