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2、5、7、9如何算出24点
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2、5、7、9如何算出24点
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答案和解析
1: 5 × 7 -(2 + 9)
2: (5 × 7) - (2 + 9)
3: 5 × 7 - 2 - 9
4: (5 × 7) - 2 - 9
5: (5 × 7 - 2) - 9
6: ((5 × 7) - 2) - 9
7: 5 × 7 -(9 + 2)
8: (5 × 7) - (9 + 2)
9: 5 × 7 - 9 - 2
10: (5 × 7) - 9 - 2
11: (5 × 7 - 9) - 2
12: ((5 × 7) - 9) - 2
13: 7 × 5 -(2 + 9)
14: (7 × 5) - (2 + 9)
15: 7 × 5 - 2 - 9
16: (7 × 5) - 2 - 9
17: (7 × 5 - 2) - 9
18: ((7 × 5) - 2) - 9
19: 7 × 5 -(9 + 2)
20: (7 × 5) - (9 + 2)
21: 7 × 5 - 9 - 2
22: (7 × 5) - 9 - 2
23: (7 × 5 - 9) - 2
24: ((7 × 5) - 9) - 2
2: (5 × 7) - (2 + 9)
3: 5 × 7 - 2 - 9
4: (5 × 7) - 2 - 9
5: (5 × 7 - 2) - 9
6: ((5 × 7) - 2) - 9
7: 5 × 7 -(9 + 2)
8: (5 × 7) - (9 + 2)
9: 5 × 7 - 9 - 2
10: (5 × 7) - 9 - 2
11: (5 × 7 - 9) - 2
12: ((5 × 7) - 9) - 2
13: 7 × 5 -(2 + 9)
14: (7 × 5) - (2 + 9)
15: 7 × 5 - 2 - 9
16: (7 × 5) - 2 - 9
17: (7 × 5 - 2) - 9
18: ((7 × 5) - 2) - 9
19: 7 × 5 -(9 + 2)
20: (7 × 5) - (9 + 2)
21: 7 × 5 - 9 - 2
22: (7 × 5) - 9 - 2
23: (7 × 5 - 9) - 2
24: ((7 × 5) - 9) - 2
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