算二十四点第一题2、7、7、10第二题3、5、5、9第三题5、5、7、11第四题2、5、5、10第五题4、9、9、12第六题3、7、9、13第七题1、3、4、6第八题2、8、9、13第九题1、6、6、8第十题2、3、5、12

第一题2、7、7、10 =7*(10÷7+2)=7*(10/7+2)=7*(24/7)=24
第二题3、5、5、9 =3*(9-5÷5)=3*(9-1)=3*8=24
第三题5、5、7、11 =5*(7-11÷5)=5*(7-2.2)=5*4.8=24
第四题2、5、5、10 =5*(5-2÷10)=5*(5-0.2)=5*4.8=24
第五题4、9、9、12 =4*(9+9-12)=4*6=24
第六题3、7、9、13 =7*9-3*13=63-39=24
第七题1、3、4、6 =6÷(1-3÷4)=6÷(1-0.75)=6÷0.25=24
第八题2、8、9、13 =(13-9)*(8-2)=4*6=24
第九题1、6、6、8 =6÷(1-6÷8)=6÷(1-0.75)=6÷0.25=24
第十题2、3、5、12 =12÷(3-5÷2)=12÷(3-2.5)=12÷0.5=24

8，8，8，11
1: 8 × 11 - 8 × 8
2: (8 × 11) - 8 × 8
3: 8 × 11 -(8 × 8)
4: (8 × 11) - (8 × 8)
5: 11 × 8 - 8 × 8
6: (11 × 8) - 8 × 8
7: 11 × 8 -(8 × 8)
8: (11 × 8) - (8 × 8)
------------
1，4，5，6
1: 4 ÷ (1 - 5 ÷ 6)
2: 4 ÷ (1 - (5 ÷ 6))
3: 6 ÷ (5 ÷ 4 - 1)
4: 6 ÷ ((5 ÷ 4) - 1) 参考资料：百度一下 回答者： 51agsp53p | 四级 | 2011-2-27 16:15
2, 7, 7, 10的24点答案：
1: (2 + 10 ÷ 7) × 7
2: (2 + (10 ÷ 7)) × 7
3: 7 × (2 + 10 ÷ 7)
4: 7 × (2 + (10 ÷ 7))
5: 7 × (10 ÷ 7 + 2)
6: 7 × ((10 ÷ 7) + 2)
7: (10 ÷ 7 + 2) × 7
8: ((10 ÷ 7) + 2) × 7
-------------------------
3, 5, 5, 9的24点答案：
1: (3 + 9 ÷ 5) × 5
2: (3 + (9 ÷ 5)) × 5
3: 3 × (9 - 5 ÷ 5)
4: 3 × (9 - (5 ÷ 5))
5: 5 × (3 + 9 ÷ 5)
6: 5 × (3 + (9 ÷ 5))
7: 5 × (9 ÷ 5 + 3)
8: 5 × ((9 ÷ 5) + 3)
9: (9 ÷ 5 + 3) × 5
10: ((9 ÷ 5) + 3) × 5
11: (9 - 5 ÷ 5) × 3
12: (9 - (5 ÷ 5)) × 3
---------------------------------
7, 5, 5, 11的24点答案：
1: (7 - 11 ÷ 5) × 5
2: (7 - (11 ÷ 5)) × 5
3: 5 × (7 - 11 ÷ 5)
4: 5 × (7 - (11 ÷ 5))
------------------------------
2, 5, 5, 10的24点答案：
1: (5 - 2 ÷ 10) × 5
2: (5 - (2 ÷ 10)) × 5
3: 5 × (5 - 2 ÷ 10)
4: 5 × (5 - (2 ÷ 10))
-----------------------------
4, 9, 9, 12的24点答案：
1: 4 × (9 + 9 - 12)
2: 4 × ((9 + 9) - 12)
3: 4 × (9 + (9 - 12))
4: 4 × (9 - 12 + 9)
5: 4 × ((9 - 12) + 9)
6: 4 × (9 - (12 - 9))
7: (4 - 12 ÷ 9) × 9
8: (4 - (12 ÷ 9)) × 9
9: 9 × (4 - 12 ÷ 9)
10: 9 × (4 - (12 ÷ 9))
11: (9 + 9 - 12) × 4
12: ((9 + 9) - 12) × 4
13: (9 + (9 - 12)) × 4
14: (9 - 12 + 9) × 4
15: ((9 - 12) + 9) × 4
16: (9 - (12 - 9)) × 4
-------------------------------
3, 7, 9, 13的24点答案：
1: 7 × 9 - 3 × 13
2: (7 × 9) - 3 × 13
3: 7 × 9 -(3 × 13)
4: (7 × 9) - (3 × 13)
5: 7 × 9 - 13 × 3
6: (7 × 9) - 13 × 3
7: 7 × 9 -(13 × 3)
8: (7 × 9) - (13 × 3)
9: (7 - 13 ÷ 3) × 9
10: (7 - (13 ÷ 3)) × 9
11: 9 × 7 - 3 × 13
12: (9 × 7) - 3 × 13
13: 9 × 7 -(3 × 13)
14: (9 × 7) - (3 × 13)
15: 9 × 7 - 13 × 3
16: (9 × 7) - 13 × 3
17: 9 × 7 -(13 × 3)
18: (9 × 7) - (13 × 3)
19: 9 × (7 - 13 ÷ 3)
20: 9 × (7 - (13 ÷ 3))
------------------------------
1, 3, 4, 6的24点答案：
1: 6 ÷ (1 - 3 ÷ 4)
2: 6 ÷ (1 - (3 ÷ 4))
--------------------------
2, 8, 9, 13的24点答案：
1: (2 - 8) × (9 - 13)
2: 2 × (8 - 9 + 13)
3: 2 × ((8 - 9) + 13)
4: 2 × (8 - (9 - 13))
5: 2 × (8 + 13 - 9)
6: 2 × ((8 + 13) - 9)
7: 2 × (8 + (13 - 9))
8: 2 × (13 + 8 - 9)
9: 2 × ((13 + 8) - 9)
10: 2 × (13 + (8 - 9))
11: 2 × (13 - 9 + 8)
12: 2 × ((13 - 9) + 8)
13: 2 × (13 - (9 - 8))
14: (8 - 2) × (13 - 9)
15: (8 - 9 + 13) × 2
16: ((8 - 9) + 13) × 2
17: (8 - (9 - 13)) × 2
18: (8 + 13 - 9) × 2
19: ((8 + 13) - 9) × 2
20: (8 + (13 - 9)) × 2
21: 9 ÷ (2 - 13 ÷ 8)
22: 9 ÷ (2 - (13 ÷ 8))
23: (9 - 13) × (2 - 8)
24: (13 + 8 - 9) × 2
25: ((13 + 8) - 9) × 2
26: (13 + (8 - 9)) × 2
27: (13 - 9 + 8) × 2
28: ((13 - 9) + 8) × 2
29: (13 - (9 - 8)) × 2
30: (13 - 9) × (8 - 2)
--------------------------------
1, 8, 6, 8的24点答案：
1: (1 + 8 - 6) × 8
2: ((1 + 8) - 6) × 8
3: (1 + (8 - 6)) × 8
4: (1 - 6 + 8) × 8
5: ((1 - 6) + 8) × 8
6: (1 - (6 - 8)) × 8
7: (8 + 1 - 6) × 8
8: ((8 + 1) - 6) × 8
9: (8 + (1 - 6)) × 8
10: 8 × (1 - 6 + 8)
11: 8 × ((1 - 6) + 8)
12: 8 × (1 - (6 - 8))
13: 8 × (1 + 8 - 6)
14: 8 × ((1 + 8) - 6)
15: 8 × (1 + (8 - 6))
16: (8 - 6 + 1) × 8
17: ((8 - 6) + 1) × 8
18: (8 - (6 - 1)) × 8
19: 8 × (8 + 1 - 6)
20: 8 × ((8 + 1) - 6)
21: 8 × (8 + (1 - 6))
22: 8 × (8 - 6 + 1)
23: 8 × ((8 - 6) + 1)
24: 8 × (8 - (6 - 1))
25: 8 ÷ (8 ÷ 6 - 1)
26: 8 ÷ ((8 ÷ 6) - 1)
----------------------------
2, 3, 5, 12的24点答案：
1: 12 ÷ (3 - 5 ÷ 2)
2: 12 ÷ (3 - (5 ÷ 2))

8,8,8,111:8 × 11 - 8 × 82:(8 × 11) - 8 × 83:8 × 11 -(8 × 8)4:(8 × 11) - (8 × 8)5:11 × 8 - 8 × 86:(11 × 8) - 8 × 87:11 × 8 -(8 × 8)8:(11 × 8) - (8 × 8)------------1,4,5,61:4 ÷ (1 - 5 ...

2, 7, 7, 10的24点答案：
1: (2 + 10 ÷ 7) × 7
2: (2 + (10 ÷ 7)) × 7
3: 7 × (2 + 10 ÷ 7)
4: 7 × (2 + (10 ÷ 7))
5: 7 × (10 ÷ 7 + 2)
6: 7 × ((10 ÷ 7) + 2)
7: (10 ÷ 7 + 2) × 7
8: ((10 ÷ 7) + 2) × 7
-------------------------
3, 5, 5, 9的24点答案：
1: (3 + 9 ÷ 5) × 5
2: (3 + (9 ÷ 5)) × 5
3: 3 × (9 - 5 ÷ 5)
4: 3 × (9 - (5 ÷ 5))
5: 5 × (3 + 9 ÷ 5)
6: 5 × (3 + (9 ÷ 5))
7: 5 × (9 ÷ 5 + 3)
8: 5 × ((9 ÷ 5) + 3)
9: (9 ÷ 5 + 3) × 5
10: ((9 ÷ 5) + 3) × 5
11: (9 - 5 ÷ 5) × 3
12: (9 - (5 ÷ 5)) × 3
---------------------------------
7, 5, 5, 11的24点答案：
1: (7 - 11 ÷ 5) × 5
2: (7 - (11 ÷ 5)) × 5
3: 5 × (7 - 11 ÷ 5)
4: 5 × (7 - (11 ÷ 5))
------------------------------
2, 5, 5, 10的24点答案：
1: (5 - 2 ÷ 10) × 5
2: (5 - (2 ÷ 10)) × 5
3: 5 × (5 - 2 ÷ 10)
4: 5 × (5 - (2 ÷ 10))
-----------------------------
4, 9, 9, 12的24点答案：
1: 4 × (9 + 9 - 12)
2: 4 × ((9 + 9) - 12)
3: 4 × (9 + (9 - 12))
4: 4 × (9 - 12 + 9)
5: 4 × ((9 - 12) + 9)
6: 4 × (9 - (12 - 9))
7: (4 - 12 ÷ 9) × 9
8: (4 - (12 ÷ 9)) × 9
9: 9 × (4 - 12 ÷ 9)
10: 9 × (4 - (12 ÷ 9))
11: (9 + 9 - 12) × 4
12: ((9 + 9) - 12) × 4
13: (9 + (9 - 12)) × 4
14: (9 - 12 + 9) × 4
15: ((9 - 12) + 9) × 4
16: (9 - (12 - 9)) × 4
-------------------------------
3, 7, 9, 13的24点答案：
1: 7 × 9 - 3 × 13
2: (7 × 9) - 3 × 13
3: 7 × 9 -(3 × 13)
4: (7 × 9) - (3 × 13)
5: 7 × 9 - 13 × 3
6: (7 × 9) - 13 × 3
7: 7 × 9 -(13 × 3)
8: (7 × 9) - (13 × 3)
9: (7 - 13 ÷ 3) × 9
10: (7 - (13 ÷ 3)) × 9
11: 9 × 7 - 3 × 13
12: (9 × 7) - 3 × 13
13: 9 × 7 -(3 × 13)
14: (9 × 7) - (3 × 13)
15: 9 × 7 - 13 × 3
16: (9 × 7) - 13 × 3
17: 9 × 7 -(13 × 3)
18: (9 × 7) - (13 × 3)
19: 9 × (7 - 13 ÷ 3)
20: 9 × (7 - (13 ÷ 3))
------------------------------
1, 3, 4, 6的24点答案：
1: 6 ÷ (1 - 3 ÷ 4)
2: 6 ÷ (1 - (3 ÷ 4))
--------------------------
2, 8, 9, 13的24点答案：
1: (2 - 8) × (9 - 13)
2: 2 × (8 - 9 + 13)
3: 2 × ((8 - 9) + 13)
4: 2 × (8 - (9 - 13))
5: 2 × (8 + 13 - 9)
6: 2 × ((8 + 13) - 9)
7: 2 × (8 + (13 - 9))
8: 2 × (13 + 8 - 9)
9: 2 × ((13 + 8) - 9)
10: 2 × (13 + (8 - 9))
11: 2 × (13 - 9 + 8)
12: 2 × ((13 - 9) + 8)
13: 2 × (13 - (9 - 8))
14: (8 - 2) × (13 - 9)
15: (8 - 9 + 13) × 2
16: ((8 - 9) + 13) × 2
17: (8 - (9 - 13)) × 2
18: (8 + 13 - 9) × 2
19: ((8 + 13) - 9) × 2
20: (8 + (13 - 9)) × 2
21: 9 ÷ (2 - 13 ÷ 8)
22: 9 ÷ (2 - (13 ÷ 8))
23: (9 - 13) × (2 - 8)
24: (13 + 8 - 9) × 2
25: ((13 + 8) - 9) × 2
26: (13 + (8 - 9)) × 2
27: (13 - 9 + 8) × 2
28: ((13 - 9) + 8) × 2
29: (13 - (9 - 8)) × 2
30: (13 - 9) × (8 - 2)
--------------------------------
1, 8, 6, 8的24点答案：
1: (1 + 8 - 6) × 8
2: ((1 + 8) - 6) × 8
3: (1 + (8 - 6)) × 8
4: (1 - 6 + 8) × 8
5: ((1 - 6) + 8) × 8
6: (1 - (6 - 8)) × 8
7: (8 + 1 - 6) × 8
8: ((8 + 1) - 6) × 8
9: (8 + (1 - 6)) × 8
10: 8 × (1 - 6 + 8)
11: 8 × ((1 - 6) + 8)
12: 8 × (1 - (6 - 8))
13: 8 × (1 + 8 - 6)
14: 8 × ((1 + 8) - 6)
15: 8 × (1 + (8 - 6))
16: (8 - 6 + 1) × 8
17: ((8 - 6) + 1) × 8
18: (8 - (6 - 1)) × 8
19: 8 × (8 + 1 - 6)
20: 8 × ((8 + 1) - 6)
21: 8 × (8 + (1 - 6))
22: 8 × (8 - 6 + 1)
23: 8 × ((8 - 6) + 1)
24: 8 × (8 - (6 - 1))
25: 8 ÷ (8 ÷ 6 - 1)
26: 8 ÷ ((8 ÷ 6) - 1)
----------------------------
2, 3, 5, 12的24点答案：
1: 12 ÷ (3 - 5 ÷ 2)
2: 12 ÷ (3 - (5 ÷ 2))