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2、5、7、3怎样计算可得到24?你能想出几种方法?
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2、5、7、3怎样计算可得到24?你能想出几种方法?
▼优质解答
答案和解析
您好：1: 2 + 5 × 3 + 7
2: (2 + 5 × 3) + 7
3: (2 + (5 × 3)) + 7
4: 2 + (5 × 3) + 7
5: 2 + (5 × 3 + 7)
6: 2 + ((5 × 3) + 7)
7: 2 + 7 + 5 × 3
8: (2 + 7) + 5 × 3
9: 2 + (7 + 5 × 3)
10: 2 + (7 + (5 × 3))
11: 2 + 7 +(5 × 3)
12: (2 + 7) + (5 × 3)
13: 2 + 7 + 3 × 5
14: (2 + 7) + 3 × 5
15: 2 + (7 + 3 × 5)
16: 2 + (7 + (3 × 5))
17: 2 + 7 +(3 × 5)
18: (2 + 7) + (3 × 5)
19: 2 + 3 × 5 + 7
20: (2 + 3 × 5) + 7
21: (2 + (3 × 5)) + 7
22: 2 + (3 × 5) + 7
23: 2 + (3 × 5 + 7)
24: 2 + ((3 × 5) + 7)
25: 5 - 2 + 7 × 3
26: (5 - 2) + 7 × 3
27: 5 - 2 +(7 × 3)
28: (5 - 2) + (7 × 3)
29: 5 - (2 - 7 × 3)
30: 5 - (2 - (7 × 3))
31: (5 - 2) × 7 + 3
32: ((5 - 2) × 7) + 3
33: 5 - 2 + 3 × 7
34: (5 - 2) + 3 × 7
35: 5 - 2 +(3 × 7)
36: (5 - 2) + (3 × 7)
37: 5 - (2 - 3 × 7)
38: 5 - (2 - (3 × 7))
39: 5 + 7 × 3 - 2
40: (5 + 7 × 3) - 2
41: (5 + (7 × 3)) - 2
42: 5 + (7 × 3) - 2
43: 5 + (7 × 3 - 2)
44: 5 + ((7 × 3) - 2)
45: 5 × 3 + 2 + 7
46: (5 × 3) + 2 + 7
47: (5 × 3 + 2) + 7
48: ((5 × 3) + 2) + 7
49: 5 × 3 +(2 + 7)
50: (5 × 3) + (2 + 7)
51: 5 + 3 × 7 - 2
52: (5 + 3 × 7) - 2
53: (5 + (3 × 7)) - 2
54: 5 + (3 × 7) - 2
55: 5 + (3 × 7 - 2)
56: 5 + ((3 × 7) - 2)
57: 5 × 3 + 7 + 2
58: (5 × 3) + 7 + 2
59: (5 × 3 + 7) + 2
60: ((5 × 3) + 7) + 2
61: 5 × 3 +(7 + 2)
62: (5 × 3) + (7 + 2)
63: 7 + 2 + 5 × 3
64: (7 + 2) + 5 × 3
65: 7 + (2 + 5 × 3)
66: 7 + (2 + (5 × 3))
67: 7 + 2 +(5 × 3)
68: (7 + 2) + (5 × 3)
69: 7 + 2 + 3 × 5
70: (7 + 2) + 3 × 5
71: 7 + (2 + 3 × 5)
72: 7 + (2 + (3 × 5))
73: 7 + 2 +(3 × 5)
74: (7 + 2) + (3 × 5)
75: (7 × (5 - 2)) + 3
76: 7 × (5 - 2) + 3
77: 7 + 5 × 3 + 2
78: (7 + 5 × 3) + 2
79: (7 + (5 × 3)) + 2
80: 7 + (5 × 3) + 2
81: 7 + (5 × 3 + 2)
82: 7 + ((5 × 3) + 2)
83: 7 × 3 - 2 + 5
84: (7 × 3) - 2 + 5
85: (7 × 3 - 2) + 5
86: ((7 × 3) - 2) + 5
87: 7 × 3 -(2 - 5)
88: (7 × 3) - (2 - 5)
89: 7 + 3 × 5 + 2
90: (7 + 3 × 5) + 2
91: (7 + (3 × 5)) + 2
92: 7 + (3 × 5) + 2
93: 7 + (3 × 5 + 2)
94: 7 + ((3 × 5) + 2)
95: 7 × 3 + 5 - 2
96: (7 × 3) + 5 - 2
97: (7 × 3 + 5) - 2
98: ((7 × 3) + 5) - 2
99: 7 × 3 +(5 - 2)
100: (7 × 3) + (5 - 2)
101: 3 - (2 - 5) × 7
102: 3 - ((2 - 5) × 7)
103: 3 + (5 - 2) × 7
104: 3 + ((5 - 2) × 7)
105: 3 × 5 + 2 + 7
106: (3 × 5) + 2 + 7
107: (3 × 5 + 2) + 7
108: ((3 × 5) + 2) + 7
109: 3 × 5 +(2 + 7)
110: (3 × 5) + (2 + 7)
111: 3 × 5 + 7 + 2
112: (3 × 5) + 7 + 2
113: (3 × 5 + 7) + 2
114: ((3 × 5) + 7) + 2
115: 3 × 5 +(7 + 2)
116: (3 × 5) + (7 + 2)
117: 3 - (7 × (2 - 5))
118: 3 - 7 ×(2 - 5)
119: 3 × 7 - 2 + 5
120: (3 × 7) - 2 + 5
121: (3 × 7 - 2) + 5
122: ((3 × 7) - 2) + 5
123: 3 × 7 -(2 - 5)
124: (3 × 7) - (2 - 5)
125: 3 + (7 × (5 - 2))
126: 3 + 7 ×(5 - 2)
127: 3 × 7 + 5 - 2
128: (3 × 7) + 5 - 2
129: (3 × 7 + 5) - 2
130: ((3 × 7) + 5) - 2
131: 3 × 7 +(5 - 2)
132: (3 × 7) + (5 - 2)
2: (2 + 5 × 3) + 7
3: (2 + (5 × 3)) + 7
4: 2 + (5 × 3) + 7
5: 2 + (5 × 3 + 7)
6: 2 + ((5 × 3) + 7)
7: 2 + 7 + 5 × 3
8: (2 + 7) + 5 × 3
9: 2 + (7 + 5 × 3)
10: 2 + (7 + (5 × 3))
11: 2 + 7 +(5 × 3)
12: (2 + 7) + (5 × 3)
13: 2 + 7 + 3 × 5
14: (2 + 7) + 3 × 5
15: 2 + (7 + 3 × 5)
16: 2 + (7 + (3 × 5))
17: 2 + 7 +(3 × 5)
18: (2 + 7) + (3 × 5)
19: 2 + 3 × 5 + 7
20: (2 + 3 × 5) + 7
21: (2 + (3 × 5)) + 7
22: 2 + (3 × 5) + 7
23: 2 + (3 × 5 + 7)
24: 2 + ((3 × 5) + 7)
25: 5 - 2 + 7 × 3
26: (5 - 2) + 7 × 3
27: 5 - 2 +(7 × 3)
28: (5 - 2) + (7 × 3)
29: 5 - (2 - 7 × 3)
30: 5 - (2 - (7 × 3))
31: (5 - 2) × 7 + 3
32: ((5 - 2) × 7) + 3
33: 5 - 2 + 3 × 7
34: (5 - 2) + 3 × 7
35: 5 - 2 +(3 × 7)
36: (5 - 2) + (3 × 7)
37: 5 - (2 - 3 × 7)
38: 5 - (2 - (3 × 7))
39: 5 + 7 × 3 - 2
40: (5 + 7 × 3) - 2
41: (5 + (7 × 3)) - 2
42: 5 + (7 × 3) - 2
43: 5 + (7 × 3 - 2)
44: 5 + ((7 × 3) - 2)
45: 5 × 3 + 2 + 7
46: (5 × 3) + 2 + 7
47: (5 × 3 + 2) + 7
48: ((5 × 3) + 2) + 7
49: 5 × 3 +(2 + 7)
50: (5 × 3) + (2 + 7)
51: 5 + 3 × 7 - 2
52: (5 + 3 × 7) - 2
53: (5 + (3 × 7)) - 2
54: 5 + (3 × 7) - 2
55: 5 + (3 × 7 - 2)
56: 5 + ((3 × 7) - 2)
57: 5 × 3 + 7 + 2
58: (5 × 3) + 7 + 2
59: (5 × 3 + 7) + 2
60: ((5 × 3) + 7) + 2
61: 5 × 3 +(7 + 2)
62: (5 × 3) + (7 + 2)
63: 7 + 2 + 5 × 3
64: (7 + 2) + 5 × 3
65: 7 + (2 + 5 × 3)
66: 7 + (2 + (5 × 3))
67: 7 + 2 +(5 × 3)
68: (7 + 2) + (5 × 3)
69: 7 + 2 + 3 × 5
70: (7 + 2) + 3 × 5
71: 7 + (2 + 3 × 5)
72: 7 + (2 + (3 × 5))
73: 7 + 2 +(3 × 5)
74: (7 + 2) + (3 × 5)
75: (7 × (5 - 2)) + 3
76: 7 × (5 - 2) + 3
77: 7 + 5 × 3 + 2
78: (7 + 5 × 3) + 2
79: (7 + (5 × 3)) + 2
80: 7 + (5 × 3) + 2
81: 7 + (5 × 3 + 2)
82: 7 + ((5 × 3) + 2)
83: 7 × 3 - 2 + 5
84: (7 × 3) - 2 + 5
85: (7 × 3 - 2) + 5
86: ((7 × 3) - 2) + 5
87: 7 × 3 -(2 - 5)
88: (7 × 3) - (2 - 5)
89: 7 + 3 × 5 + 2
90: (7 + 3 × 5) + 2
91: (7 + (3 × 5)) + 2
92: 7 + (3 × 5) + 2
93: 7 + (3 × 5 + 2)
94: 7 + ((3 × 5) + 2)
95: 7 × 3 + 5 - 2
96: (7 × 3) + 5 - 2
97: (7 × 3 + 5) - 2
98: ((7 × 3) + 5) - 2
99: 7 × 3 +(5 - 2)
100: (7 × 3) + (5 - 2)
101: 3 - (2 - 5) × 7
102: 3 - ((2 - 5) × 7)
103: 3 + (5 - 2) × 7
104: 3 + ((5 - 2) × 7)
105: 3 × 5 + 2 + 7
106: (3 × 5) + 2 + 7
107: (3 × 5 + 2) + 7
108: ((3 × 5) + 2) + 7
109: 3 × 5 +(2 + 7)
110: (3 × 5) + (2 + 7)
111: 3 × 5 + 7 + 2
112: (3 × 5) + 7 + 2
113: (3 × 5 + 7) + 2
114: ((3 × 5) + 7) + 2
115: 3 × 5 +(7 + 2)
116: (3 × 5) + (7 + 2)
117: 3 - (7 × (2 - 5))
118: 3 - 7 ×(2 - 5)
119: 3 × 7 - 2 + 5
120: (3 × 7) - 2 + 5
121: (3 × 7 - 2) + 5
122: ((3 × 7) - 2) + 5
123: 3 × 7 -(2 - 5)
124: (3 × 7) - (2 - 5)
125: 3 + (7 × (5 - 2))
126: 3 + 7 ×(5 - 2)
127: 3 × 7 + 5 - 2
128: (3 × 7) + 5 - 2
129: (3 × 7 + 5) - 2
130: ((3 × 7) + 5) - 2
131: 3 × 7 +(5 - 2)
132: (3 × 7) + (5 - 2)
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