4、9、12、1这些要等于24，怎么算？

4、9、12、1这些要等于24，怎么算？

(4×9-12)×1=24
4+9+12-1=24

1: 4 + 9 + 12 - 1
2: (4 + 9) + 12 - 1
3: (4 + 9 + 12) - 1
4: ((4 + 9) + 12) - 1
5: (4 + (9 + 12)) - 1
6: 4 + (9 + 12) - 1
7: 4 + (9 + 12 - 1)
8: 4 + ((9 + 12) - 1)
9: 4 + (9 + (12 - 1))
10: 4 + 9 +(12 - 1)
11: (4 + 9) + (12 - 1)
12: 4 × 9 - 12 × 1
13: (4 × 9) - 12 × 1
14: (4 × 9 - 12) × 1
15: ((4 × 9) - 12) × 1
16: 4 × 9 -(12 × 1)
17: (4 × 9) - (12 × 1)
18: 4 × 9 - 12 ÷ 1
19: (4 × 9) - 12 ÷ 1
20: (4 × 9 - 12) ÷ 1
21: ((4 × 9) - 12) ÷ 1
22: 4 × 9 -(12 ÷ 1)
23: (4 × 9) - (12 ÷ 1)
24: 4 + 9 - 1 + 12
25: (4 + 9) - 1 + 12
26: (4 + 9 - 1) + 12
27: ((4 + 9) - 1) + 12
28: (4 + (9 - 1)) + 12
29: 4 + (9 - 1) + 12
30: 4 + (9 - 1 + 12)
31: 4 + ((9 - 1) + 12)
32: 4 + (9 - (1 - 12))
33: 4 + 9 -(1 - 12)
34: (4 + 9) - (1 - 12)
35: 4 × 9 - 1 × 12
36: (4 × 9) - 1 × 12
37: 4 × 9 -(1 × 12)
38: (4 × 9) - (1 × 12)
39: 4 × 9 × 1 - 12
40: (4 × 9) × 1 - 12
41: (4 × 9 × 1) - 12
42: ((4 × 9) × 1) - 12
43: (4 × (9 × 1)) - 12
44: 4 × (9 × 1) - 12
45: 4 × 9 ÷ 1 - 12
46: (4 × 9) ÷ 1 - 12
47: (4 × 9 ÷ 1) - 12
48: ((4 × 9) ÷ 1) - 12
49: (4 × (9 ÷ 1)) - 12
50: 4 × (9 ÷ 1) - 12
51: 4 + 12 + 9 - 1
52: (4 + 12) + 9 - 1
53: (4 + 12 + 9) - 1
54: ((4 + 12) + 9) - 1
55: (4 + (12 + 9)) - 1
56: 4 + (12 + 9) - 1
57: 4 + (12 + 9 - 1)
58: 4 + ((12 + 9) - 1)
59: 4 + (12 + (9 - 1))
60: 4 + 12 +(9 - 1)
61: (4 + 12) + (9 - 1)
62: 4 + 12 - 1 + 9
63: (4 + 12) - 1 + 9
64: (4 + 12 - 1) + 9
65: ((4 + 12) - 1) + 9
66: (4 + (12 - 1)) + 9
67: 4 + (12 - 1) + 9
68: 4 + (12 - 1 + 9)
69: 4 + ((12 - 1) + 9)
70: 4 + (12 - (1 - 9))
71: 4 + 12 -(1 - 9)
72: (4 + 12) - (1 - 9)
73: 4 - 1 + 9 + 12
74: (4 - 1) + 9 + 12
75: (4 - 1 + 9) + 12
76: ((4 - 1) + 9) + 12
77: 4 - 1 +(9 + 12)
78: (4 - 1) + (9 + 12)
79: (4 - (1 - 9)) + 12
80: 4 - (1 - 9) + 12
81: 4 - (1 - (9 + 12))
82: 4 - (1 - 9 - 12)
83: 4 - ((1 - 9) - 12)
84: 4 × 1 × 9 - 12
85: (4 × 1) × 9 - 12
86: (4 × 1 × 9) - 12
87: ((4 × 1) × 9) - 12
88: (4 × (1 × 9)) - 12
89: 4 × (1 × 9) - 12
90: 4 ÷ 1 × 9 - 12
91: (4 ÷ 1) × 9 - 12
92: (4 ÷ 1 × 9) - 12
93: ((4 ÷ 1) × 9) - 12
94: (4 ÷ (1 ÷ 9)) - 12
95: 4 ÷ (1 ÷ 9) - 12
96: 4 - 1 + 12 + 9
97: (4 - 1) + 12 + 9
98: (4 - 1 + 12) + 9
99: ((4 - 1) + 12) + 9
100: 4 - 1 +(12 + 9)
101: (4 - 1) + (12 + 9)
102: (4 - (1 - 12)) + 9
103: 4 - (1 - 12) + 9
104: 4 - (1 - (12 + 9))
105: 4 - (1 - 12 - 9)
106: 4 - ((1 - 12) - 9)
107: 9 + 4 + 12 - 1
108: (9 + 4) + 12 - 1
109: (9 + 4 + 12) - 1
110: ((9 + 4) + 12) - 1
111: (9 + (4 + 12)) - 1
112: 9 + (4 + 12) - 1
113: 9 + (4 + 12 - 1)
114: 9 + ((4 + 12) - 1)
115: 9 + (4 + (12 - 1))
116: 9 + 4 +(12 - 1)
117: (9 + 4) + (12 - 1)
118: 9 × 4 - 12 × 1
119: (9 × 4) - 12 × 1
120: (9 × 4 - 12) × 1
121: ((9 × 4) - 12) × 1
122: 9 × 4 -(12 × 1)
123: (9 × 4) - (12 × 1)
124: 9 × 4 - 12 ÷ 1
125: (9 × 4) - 12 ÷ 1
126: (9 × 4 - 12) ÷ 1
127: ((9 × 4) - 12) ÷ 1
128: 9 × 4 -(12 ÷ 1)
129: (9 × 4) - (12 ÷ 1)
130: 9 + 4 - 1 + 12
131: (9 + 4) - 1 + 12
132: (9 + 4 - 1) + 12
133: ((9 + 4) - 1) + 12
134: (9 + (4 - 1)) + 12
135: 9 + (4 - 1) + 12
136: 9 + (4 - 1 + 12)
137: 9 + ((4 - 1) + 12)
138: 9 + (4 - (1 - 12))
139: 9 + 4 -(1 - 12)
140: (9 + 4) - (1 - 12)
141: 9 × 4 - 1 × 12
142: (9 × 4) - 1 × 12
143: 9 × 4 -(1 × 12)
144: (9 × 4) - (1 × 12)
145: 9 × 4 × 1 - 12
146: (9 × 4) × 1 - 12
147: (9 × 4 × 1) - 12
148: ((9 × 4) × 1) - 12
149: (9 × (4 × 1)) - 12
150: 9 × (4 × 1) - 12
151: 9 × 4 ÷ 1 - 12
152: (9 × 4) ÷ 1 - 12
153: (9 × 4 ÷ 1) - 12
154: ((9 × 4) ÷ 1) - 12
155: (9 × (4 ÷ 1)) - 12
156: 9 × (4 ÷ 1) - 12
157: 9 + 12 + 4 - 1
158: (9 + 12) + 4 - 1
159: (9 + 12 + 4) - 1
160: ((9 + 12) + 4) - 1
161: (9 + (12 + 4)) - 1
162: 9 + (12 + 4) - 1
163: 9 + (12 + 4 - 1)
164: 9 + ((12 + 4) - 1)
165: 9 + (12 + (4 - 1))
166: 9 + 12 +(4 - 1)
167: (9 + 12) + (4 - 1)
168: 9 + 12 - 1 + 4
169: (9 + 12) - 1 + 4
170: (9 + 12 - 1) + 4
171: ((9 + 12) - 1) + 4
172: (9 + (12 - 1)) + 4
173: 9 + (12 - 1) + 4
174: 9 + (12 - 1 + 4)
175: 9 + ((12 - 1) + 4)
176: 9 + (12 - (1 - 4))
177: 9 + 12 -(1 - 4)
178: (9 + 12) - (1 - 4)
179: 9 - 1 + 4 + 12
180: (9 - 1) + 4 + 12
181: (9 - 1 + 4) + 12
182: ((9 - 1) + 4) + 12
183: 9 - 1 +(4 + 12)
184: (9 - 1) + (4 + 12)
185: (9 - (1 - 4)) + 12
186: 9 - (1 - 4) + 12
187: 9 - (1 - (4 + 12))
188: 9 - (1 - 4 - 12)
189: 9 - ((1 - 4) - 12)
190: (9 - 1) ÷ 4 × 12
191: ((9 - 1) ÷ 4) × 12
192: (9 - 1) ÷ (4 ÷ 12)
193: 9 × 1 × 4 - 12
194: (9 × 1) × 4 - 12
195: (9 × 1 × 4) - 12
196: ((9 × 1) × 4) - 12
197: (9 × (1 × 4)) - 12
198: 9 × (1 × 4) - 12
199: 9 ÷ 1 × 4 - 12
200: (9 ÷ 1) × 4 - 12
201: (9 ÷ 1 × 4) - 12
202: ((9 ÷ 1) × 4) - 12
203: (9 ÷ (1 ÷ 4)) - 12
204: 9 ÷ (1 ÷ 4) - 12
205: 9 - 1 + 12 + 4
206: (9 - 1) + 12 + 4
207: (9 - 1 + 12) + 4
208: ((9 - 1) + 12) + 4
209: 9 - 1 +(12 + 4)
210: (9 - 1) + (12 + 4)
211: (9 - (1 - 12)) + 4
212: 9 - (1 - 12) + 4
213: 9 - (1 - (12 + 4))
214: 9 - (1 - 12 - 4)
215: 9 - ((1 - 12) - 4)
216: (9 - 1) × 12 ÷ 4
217: ((9 - 1) × 12) ÷ 4
218: (9 - 1) × (12 ÷ 4)
219: 12 + 4 + 9 - 1
220: (12 + 4) + 9 - 1
221: (12 + 4 + 9) - 1
222: ((12 + 4) + 9) - 1
223: (12 + (4 + 9)) - 1
224: 12 + (4 + 9) - 1
225: 12 + (4 + 9 - 1)
226: 12 + ((4 + 9) - 1)
227: 12 + (4 + (9 - 1))
228: 12 + 4 +(9 - 1)
229: (12 + 4) + (9 - 1)
230: 12 ÷ 4 ×(9 - 1)
231: (12 ÷ 4) × (9 - 1)
232: 12 ÷ (4 ÷ (9 - 1))
233: 12 + 4 - 1 + 9
234: (12 + 4) - 1 + 9
235: (12 + 4 - 1) + 9
236: ((12 + 4) - 1) + 9
237: (12 + (4 - 1)) + 9
238: 12 + (4 - 1) + 9
239: 12 + (4 - 1 + 9)
240: 12 + ((4 - 1) + 9)
241: 12 + (4 - (1 - 9))
242: 12 + 4 -(1 - 9)
243: (12 + 4) - (1 - 9)
244: 12 + 9 + 4 - 1
245: (12 + 9) + 4 - 1
246: (12 + 9 + 4) - 1
247: ((12 + 9) + 4) - 1
248: (12 + (9 + 4)) - 1
249: 12 + (9 + 4) - 1
250: 12 + (9 + 4 - 1)
251: 12 + ((9 + 4) - 1)
252: 12 + (9 + (4 - 1))
253: 12 + 9 +(4 - 1)
254: (12 + 9) + (4 - 1)
255: 12 + 9 - 1 + 4
256: (12 + 9) - 1 + 4
257: (12 + 9 - 1) + 4
258: ((12 + 9) - 1) + 4
259: (12 + (9 - 1)) + 4
260: 12 + (9 - 1) + 4
261: 12 + (9 - 1 + 4)
262: 12 + ((9 - 1) + 4)
263: 12 + (9 - (1 - 4))
264: 12 + 9 -(1 - 4)
265: (12 + 9) - (1 - 4)
266: (12 × (9 - 1)) ÷ 4
267: 12 × (9 - 1) ÷ 4
268: 12 × ((9 - 1) ÷ 4)
269: 12 - 1 + 4 + 9
270: (12 - 1) + 4 + 9
271: (12 - 1 + 4) + 9
272: ((12 - 1) + 4) + 9
273: 12 - 1 +(4 + 9)
274: (12 - 1) + (4 + 9)
275: (12 - (1 - 4)) + 9
276: 12 - (1 - 4) + 9
277: 12 - (1 - (4 + 9))
278: 12 - (1 - 4 - 9)
279: 12 - ((1 - 4) - 9)
280: 12 - 1 + 9 + 4
281: (12 - 1) + 9 + 4
282: (12 - 1 + 9) + 4
283: ((12 - 1) + 9) + 4
284: 12 - 1 +(9 + 4)
285: (12 - 1) + (9 + 4)
286: (12 - (1 - 9)) + 4
287: 12 - (1 - 9) + 4
288: 12 - (1 - (9 + 4))
289: 12 - (1 - 9 - 4)
290: 12 - ((1 - 9) - 4)
291: 1 × 4 × 9 - 12
292: (1 × 4) × 9 - 12
293: (1 × 4 × 9) - 12
294: ((1 × 4) × 9) - 12
295: (1 × (4 × 9)) - 12
296: 1 × (4 × 9) - 12
297: 1 × (4 × 9 - 12)
298: 1 × ((4 × 9) - 12)
299: 1 × 9 × 4 - 12
300: (1 × 9) × 4 - 12
301: (1 × 9 × 4) - 12
302: ((1 × 9) × 4) - 12
303: (1 × (9 × 4)) - 12
304: 1 × (9 × 4) - 12
305: 1 × (9 × 4 - 12)
306: 1 × ((9 × 4) - 12)

4+9+12-1=24

[(9-1)/4]*12

12+9+4-1

【（4*9）-12】*1

（4乘9 -12）乘1