大家帮我做几个24点

1255还有1277怎么算24点

5×5-2+1=24
5×5+1-2=24

(7×7-1)÷2=24
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第1个回答  2010-03-14
第一个5*5-2+1=24
第二个(7*7-1)/2=24
第2个回答  2010-03-14
5*5-2+1=24
第3个回答  2010-03-20
1: 1 - 2 + 5 × 5
2: (1 - 2) + 5 × 5
3: 1 - 2 +(5 × 5)
4: (1 - 2) + (5 × 5)
5: 1 - (2 - 5 × 5)
6: 1 - (2 - (5 × 5))
7: 1 + 5 × 5 - 2
8: (1 + 5 × 5) - 2
9: (1 + (5 × 5)) - 2
10: 1 + (5 × 5) - 2
11: 1 + (5 × 5 - 2)
12: 1 + ((5 × 5) - 2)
13: 5 × 5 + 1 - 2
14: (5 × 5) + 1 - 2
15: (5 × 5 + 1) - 2
16: ((5 × 5) + 1) - 2
17: 5 × 5 +(1 - 2)
18: (5 × 5) + (1 - 2)
19: 5 × 5 - 2 + 1
20: (5 × 5) - 2 + 1
21: (5 × 5 - 2) + 1
22: ((5 × 5) - 2) + 1
23: 5 × 5 -(2 - 1)
24: (5 × 5) - (2 - 1)

1: (7 × 7 - 1) ÷ 2
2: ((7 × 7) - 1) ÷ 2
第4个回答  2010-03-20
1,2,5,5的有:

1: 1 - 2 + 5 × 5
2: (1 - 2) + 5 × 5
3: 1 - 2 +(5 × 5)
4: (1 - 2) + (5 × 5)
5: 1 - (2 - 5 × 5)
6: 1 - (2 - (5 × 5))
7: 1 + 5 × 5 - 2
8: (1 + 5 × 5) - 2
9: (1 + (5 × 5)) - 2
10: 1 + (5 × 5) - 2
11: 1 + (5 × 5 - 2)
12: 1 + ((5 × 5) - 2)
13: 5 × 5 + 1 - 2
14: (5 × 5) + 1 - 2
15: (5 × 5 + 1) - 2
16: ((5 × 5) + 1) - 2
17: 5 × 5 +(1 - 2)
18: (5 × 5) + (1 - 2)
19: 5 × 5 - 2 + 1
20: (5 × 5) - 2 + 1
21: (5 × 5 - 2) + 1
22: ((5 × 5) - 2) + 1
23: 5 × 5 -(2 - 1)
24: (5 × 5) - (2 - 1)

1,2,7,7的有:
1: (7 × 7 - 1) ÷ 2
2: ((7 × 7) - 1) ÷ 2
第5个回答  2010-03-28
1: 1 - 2 + 5 × 5
2: (1 - 2) + 5 × 5
3: 1 - 2 +(5 × 5)
4: (1 - 2) + (5 × 5)
5: 1 - (2 - 5 × 5)
6: 1 - (2 - (5 × 5))
7: 1 + 5 × 5 - 2
8: (1 + 5 × 5) - 2
9: (1 + (5 × 5)) - 2
10: 1 + (5 × 5) - 2
11: 1 + (5 × 5 - 2)
12: 1 + ((5 × 5) - 2)
13: 5 × 5 + 1 - 2
14: (5 × 5) + 1 - 2
15: (5 × 5 + 1) - 2
16: ((5 × 5) + 1) - 2
17: 5 × 5 +(1 - 2)
18: (5 × 5) + (1 - 2)
19: 5 × 5 - 2 + 1
20: (5 × 5) - 2 + 1
21: (5 × 5 - 2) + 1
22: ((5 × 5) - 2) + 1
23: 5 × 5 -(2 - 1)
24: (5 × 5) - (2 - 1)

1,2,7,7的有:
1: (7 × 7 - 1) ÷ 2
2: ((7 × 7) - 1) ÷ 2 1: 1 - 2 + 5 × 5
2: (1 - 2) + 5 × 5
3: 1 - 2 +(5 × 5)
4: (1 - 2) + (5 × 5)
5: 1 - (2 - 5 × 5)
6: 1 - (2 - (5 × 5))
7: 1 + 5 × 5 - 2
8: (1 + 5 × 5) - 2
9: (1 + (5 × 5)) - 2
10: 1 + (5 × 5) - 2
11: 1 + (5 × 5 - 2)
12: 1 + ((5 × 5) - 2)
13: 5 × 5 + 1 - 2
14: (5 × 5) + 1 - 2
15: (5 × 5 + 1) - 2
16: ((5 × 5) + 1) - 2
17: 5 × 5 +(1 - 2)
18: (5 × 5) + (1 - 2)
19: 5 × 5 - 2 + 1
20: (5 × 5) - 2 + 1
21: (5 × 5 - 2) + 1
22: ((5 × 5) - 2) + 1
23: 5 × 5 -(2 - 1)
24: (5 × 5) - (2 - 1)