合24 (合二十四)

1 5 11 12
(11 - 1) ÷ 5 × 12
((11 - 1) ÷ 5) × 12
(11 - 1) ÷ (5 ÷ 12)
(11 - 1) × 12 ÷ 5
((11 - 1) × 12) ÷ 5
(11 - 1) × (12 ÷ 5)
12 ÷ 5 ×(11 - 1)
(12 ÷ 5) × (11 - 1)
12 ÷ (5 ÷ (11 - 1))
(12 × (11 - 1)) ÷ 5
12 × (11 - 1) ÷ 5
12: 12 × ((11 - 1) ÷ 5)


3 7 7 9
3 × (9 - 7 ÷ 7)
3 × (9 - (7 ÷ 7))
(9 - 7 ÷ 7) × 3
(9 - (7 ÷ 7)) × 3

4 4 8 9
4 × 9 -(4 + 8)
(4 × 9) - (4 + 8)
4 × 9 - 4 - 8
(4 × 9) - 4 - 8
(4 × 9 - 4) - 8
((4 × 9) - 4) - 8
4 × 9 -(8 + 4)
(4 × 9) - (8 + 4)
4 × 9 - 8 - 4
(4 × 9) - 8 - 4
(4 × 9 - 8) - 4
((4 × 9) - 8) - 4
9 × 4 -(4 + 8)
(9 × 4) - (4 + 8)
9 × 4 - 4 - 8
(9 × 4) - 4-8
(9 × 4 - 4) - 8
9 × 4 -(8 + 4)
(9 × 4) - (8 + 4)
9 × 4 - 8 - 4
(9 × 4) - 8 - 4
(9 × 4 - 8) - 4
((9 × 4) - 8) - 4

2008-06-30 20:43:33 補充：
5 10 10 13
(10 × 13 - 10) ÷ 5
((10 × 13) - 10) ÷ 5
(13 × 10 - 10) ÷ 5
((13 × 10) - 10) ÷ 5

2008-06-30 20:43:47 補充：
4 7 9 11
(7 - 4) × 11 - 9
((7 - 4) × 11) - 9
(7 × (9 - 4)) - 11
7 × (9 - 4) - 11
(9 - 4) × 7 - 11
((9 - 4) × 7) - 11
(11 × (7 - 4)) - 9
11 × (7 - 4) - 9

2008-06-30 20:47:30 補充：
7 8 8 13
8 ÷ 7 ×(8 + 13)
(8 ÷ 7) × (8 + 13)
8 ÷ (7 ÷ (8 + 13))
8 ÷ 7 ×(13 + 8)
(8 ÷ 7) × (13 + 8)
8 ÷ (7 ÷ (13 + 8))
(8 × (8 + 13)) ÷ 7

2008-06-30 20:47:51 補充：
7 8 8 13
8 × (8 + 13) ÷ 7
8 × ((8 + 13) ÷ 7)
(8 + 13) ÷ 7 × 8
((8 + 13) ÷ 7) × 8
(8 + 13) ÷ (7 ÷ 8)
(8 + 13) × 8 ÷ 7
((8 + 13) × 8) ÷ 7
(8 + 13) × (8 ÷ 7)
(8 × (13 + 8)) ÷ 7
8 × (13 + 8) ÷ 7

2008-06-30 20:48:03 補充：
7 8 8 13
8 × ((13 + 8) ÷ 7)
(13 + 8) ÷ 7 × 8
((13 + 8) ÷ 7) × 8
(13 + 8) ÷ (7 ÷ 8)
(13 + 8) × 8 ÷ 7
((13 + 8) × 8) ÷ 7
(13 + 8) × (8 ÷ 7)

2008-06-30 20:48:27 補充：
3 3 7 12
1: 12 + (7 - 3) × 3
2: 12 + ((7 - 3) × 3)
3: (12 - 7 + 3) × 3
4: ((12 - 7) + 3) × 3
5: (12 - (7 - 3)) × 3
6: (12 + 3 - 7) × 3
7: ((12 + 3) - 7) × 3

2008-06-30 20:48:39 補充：
3 3 7 12
8: (12 + (3 - 7)) × 3
9: 12 + (3 × (7 - 3))
10: 12 + 3 ×(7 - 3)
11: 12 - (3 - 7) × 3
12: 12 - ((3 - 7) × 3)
13: 12 - (3 × (3 - 7))
14: 12 - 3 ×(3 - 7)

2008-06-30 20:49:03 補充：
3 3 7 12
15: 12 × (3 × 3 - 7)
16: 12 × ((3 × 3) - 7)
17: (7 - 3) × 3 + 12
18: ((7 - 3) × 3) + 12
19: (3 + 12 - 7) × 3
20: ((3 + 12) - 7) × 3
21: (3 + (12 - 7)) × 3
22: 3 × (12 - 7 + 3)
23: 3 × ((12 - 7) + 3)

2008-06-30 20:49:19 補充：
3 3 7 12
24: 3 × (12 - (7 - 3))
25: 3 × (12 + 3 - 7)
26: 3 × ((12 + 3) - 7)
27: 3 × (12 + (3 - 7))
28: (3 - 7 + 12) × 3
29: ((3 - 7) + 12) × 3
30: (3 - (7 - 12)) × 3
31: (3 × (7 - 3)) + 12

2008-06-30 20:49:40 補充：
3 3 7 12
32: 3 × (7 - 3) + 12
33: 3 × (3 + 12 - 7)
34: 3 × ((3 + 12) - 7)
35: 3 × (3 + (12 - 7))
36: 3 × (3 - 7 + 12)
37: 3 × ((3 - 7) + 12)
38: 3 × (3 - (7 - 12))
39: (3 × 3 - 7) × 12
40: ((3 × 3) - 7) × 12

2008-06-30 20:53:25 補充：
我無答果d係我唔識...........

6、7、7、8 不能
1 5 11 12 不能
3 7 8 10 不能
3 7 7 9 （ 9－7÷7）×3
4 4 8 9 4×9－4－8
3 3 7 12 （12－7＋3）×3
7 8 8 13 （13＋8）÷7×8
2 3 9 11 不能
4 7 9 11 （9－4）×7－11
5 10 10 13 （13×10－10）÷5

2008-06-30 20:51:18 補充：
1 5 11 12 (11 - 1) ÷ 5 × 12

4 4 8 9

4x9-8-4

.....^^

2008-06-30 20:30:39 補充：
3 3 7 12
3x(12-7+3)