1，2，3，4，四个数字，分别用加减乘除计算，得数为24，符号数字只能用一次，而且必须用

1: (1 + 2 + 3) × 4
2: ((1 + 2) + 3) × 4
3: (1 + (2 + 3)) × 4
4: 1 × 2 × 3 × 4
5: (1 × 2) × 3 × 4
6: (1 × 2 × 3) × 4
7: ((1 × 2) × 3) × 4
8: (1 × (2 × 3)) × 4
9: 1 × (2 × 3) × 4
10: 1 × (2 × 3 × 4)
11: 1 × ((2 × 3) × 4)
12: 1 × (2 × (3 × 4))
13: 1 × 2 ×(3 × 4)
14: (1 × 2) × (3 × 4)
15: 1 × 2 × 4 × 3
16: (1 × 2) × 4 × 3
17: (1 × 2 × 4) × 3
18: ((1 × 2) × 4) × 3
19: (1 × (2 × 4)) × 3
20: 1 × (2 × 4) × 3
21: 1 × (2 × 4 × 3)
22: 1 × ((2 × 4) × 3)
23: 1 × (2 × (4 × 3))
24: 1 × 2 ×(4 × 3)
25: (1 × 2) × (4 × 3)
26: (1 + 3 + 2) × 4
27: ((1 + 3) + 2) × 4
28: (1 + (3 + 2)) × 4
29: (1 + 3) × (2 + 4)
30: 1 × 3 × 2 × 4
31: (1 × 3) × 2 × 4
32: (1 × 3 × 2) × 4
33: ((1 × 3) × 2) × 4
34: (1 × (3 × 2)) × 4
35: 1 × (3 × 2) × 4
36: 1 × (3 × 2 × 4)
37: 1 × ((3 × 2) × 4)
38: 1 × (3 × (2 × 4))
39: 1 × 3 ×(2 × 4)
40: (1 × 3) × (2 × 4)
41: (1 + 3) × (4 + 2)
42: 1 × 3 × 4 × 2
43: (1 × 3) × 4 × 2
44: (1 × 3 × 4) × 2
45: ((1 × 3) × 4) × 2
46: (1 × (3 × 4)) × 2
47: 1 × (3 × 4) × 2
48: 1 × (3 × 4 × 2)
49: 1 × ((3 × 4) × 2)
50: 1 × (3 × (4 × 2))
51: 1 × 3 ×(4 × 2)
52: (1 × 3) × (4 × 2)
53: 1 × 4 × 2 × 3
54: (1 × 4) × 2 × 3
55: (1 × 4 × 2) × 3
56: ((1 × 4) × 2) × 3
57: (1 × (4 × 2)) × 3
58: 1 × (4 × 2) × 3
59: 1 × (4 × 2 × 3)
60: 1 × ((4 × 2) × 3)
61: 1 × (4 × (2 × 3))
62: 1 × 4 ×(2 × 3)
63: (1 × 4) × (2 × 3)
64: 1 × 4 × 3 × 2
65: (1 × 4) × 3 × 2
66: (1 × 4 × 3) × 2
67: ((1 × 4) × 3) × 2
68: (1 × (4 × 3)) × 2
69: 1 × (4 × 3) × 2
70: 1 × (4 × 3 × 2)
71: 1 × ((4 × 3) × 2)
72: 1 × (4 × (3 × 2))
73: 1 × 4 ×(3 × 2)
74: (1 × 4) × (3 × 2)
75: (2 + 1 + 3) × 4
76: ((2 + 1) + 3) × 4
77: (2 + (1 + 3)) × 4
78: 2 × 1 × 3 × 4
79: (2 × 1) × 3 × 4
80: (2 × 1 × 3) × 4
81: ((2 × 1) × 3) × 4
82: (2 × (1 × 3)) × 4
83: 2 × (1 × 3) × 4
84: 2 × (1 × 3 × 4)
85: 2 × ((1 × 3) × 4)
86: 2 × (1 × (3 × 4))
87: 2 × 1 ×(3 × 4)
88: (2 × 1) × (3 × 4)
89: 2 ÷ 1 × 3 × 4
90: (2 ÷ 1) × 3 × 4
91: (2 ÷ 1 × 3) × 4
92: ((2 ÷ 1) × 3) × 4
93: 2 ÷ 1 ×(3 × 4)
94: (2 ÷ 1) × (3 × 4)
95: (2 ÷ (1 ÷ 3)) × 4
96: 2 ÷ (1 ÷ 3) × 4
97: 2 ÷ (1 ÷ (3 × 4))
98: 2 ÷ (1 ÷ 3 ÷ 4)
99: 2 ÷ ((1 ÷ 3) ÷ 4)
100: 2 × 1 × 4 × 3
101: (2 × 1) × 4 × 3
102: (2 × 1 × 4) × 3
103: ((2 × 1) × 4) × 3
104: (2 × (1 × 4)) × 3
105: 2 × (1 × 4) × 3
106: 2 × (1 × 4 × 3)
107: 2 × ((1 × 4) × 3)
108: 2 × (1 × (4 × 3))
109: 2 × 1 ×(4 × 3)
110: (2 × 1) × (4 × 3)
111: 2 ÷ 1 × 4 × 3
112: (2 ÷ 1) × 4 × 3
113: (2 ÷ 1 × 4) × 3
114: ((2 ÷ 1) × 4) × 3
115: 2 ÷ 1 ×(4 × 3)
116: (2 ÷ 1) × (4 × 3)
117: (2 ÷ (1 ÷ 4)) × 3
118: 2 ÷ (1 ÷ 4) × 3
119: 2 ÷ (1 ÷ (4 × 3))
120: 2 ÷ (1 ÷ 4 ÷ 3)
121: 2 ÷ ((1 ÷ 4) ÷ 3)
122: (2 + 3 + 1) × 4
123: ((2 + 3) + 1) × 4
124: (2 + (3 + 1)) × 4
125: 2 × 3 × 1 × 4
126: (2 × 3) × 1 × 4
127: (2 × 3 × 1) × 4
128: ((2 × 3) × 1) × 4
129: (2 × (3 × 1)) × 4
130: 2 × (3 × 1) × 4
131: 2 × (3 × 1 × 4)
132: 2 × ((3 × 1) × 4)
133: 2 × (3 × (1 × 4))
134: 2 × 3 ×(1 × 4)
135: (2 × 3) × (1 × 4)
136: 2 × 3 ÷ 1 × 4
137: (2 × 3) ÷ 1 × 4
138: (2 × 3 ÷ 1) × 4
139: ((2 × 3) ÷ 1) × 4
140: (2 × (3 ÷ 1)) × 4
141: 2 × (3 ÷ 1) × 4
142: 2 × (3 ÷ 1 × 4)
143: 2 × ((3 ÷ 1) × 4)
144: 2 × (3 ÷ (1 ÷ 4))
145: 2 × 3 ÷(1 ÷ 4)
146: (2 × 3) ÷ (1 ÷ 4)
147: 2 × 3 × 4 × 1
148: (2 × 3) × 4 × 1
149: (2 × 3 × 4) × 1
150: ((2 × 3) × 4) × 1
151: (2 × (3 × 4)) × 1
152: 2 × (3 × 4) × 1
153: 2 × (3 × 4 × 1)
154: 2 × ((3 × 4) × 1)
155: 2 × (3 × (4 × 1))
156: 2 × 3 ×(4 × 1)
157: (2 × 3) × (4 × 1)
158: 2 × 3 × 4 ÷ 1
159: (2 × 3) × 4 ÷ 1
160: (2 × 3 × 4) ÷ 1
161: ((2 × 3) × 4) ÷ 1
162: (2 × (3 × 4)) ÷ 1
163: 2 × (3 × 4) ÷ 1
164: 2 × (3 × 4 ÷ 1)
165: 2 × ((3 × 4) ÷ 1)
166: 2 × (3 × (4 ÷ 1))
167: 2 × 3 ×(4 ÷ 1)
168: (2 × 3) × (4 ÷ 1)
169: (2 + 4) × (1 + 3)
170: 2 × 4 × 1 × 3
171: (2 × 4) × 1 × 3
172: (2 × 4 × 1) × 3
173: ((2 × 4) × 1) × 3
174: (2 × (4 × 1)) × 3
175: 2 × (4 × 1) × 3
176: 2 × (4 × 1 × 3)
177: 2 × ((4 × 1) × 3)
178: 2 × (4 × (1 × 3))
179: 2 × 4 ×(1 × 3)
180: (2 × 4) × (1 × 3)
181: 2 × 4 ÷ 1 × 3
182: (2 × 4) ÷ 1 × 3
183: (2 × 4 ÷ 1) × 3
184: ((2 × 4) ÷ 1) × 3
185: (2 × (4 ÷ 1)) × 3
186: 2 × (4 ÷ 1) × 3
187: 2 × (4 ÷ 1 × 3)
188: 2 × ((4 ÷ 1) × 3)
189: 2 × (4 ÷ (1 ÷ 3))
190: 2 × 4 ÷(1 ÷ 3)
191: (2 × 4) ÷ (1 ÷ 3)
192: (2 + 4) × (3 + 1)
193: 2 × 4 × 3 × 1
194: (2 × 4) × 3 × 1
195: (2 × 4 × 3) × 1
196: ((2 × 4) × 3) × 1
197: (2 × (4 × 3)) × 1
198: 2 × (4 × 3) × 1
199: 2 × (4 × 3 × 1)
200: 2 × ((4 × 3) × 1)
201: 2 × (4 × (3 × 1))
202: 2 × 4 ×(3 × 1)
203: (2 × 4) × (3 × 1)
204: 2 × 4 × 3 ÷ 1
205: (2 × 4) × 3 ÷ 1
206: (2 × 4 × 3) ÷ 1
207: ((2 × 4) × 3) ÷ 1
208: (2 × (4 × 3)) ÷ 1
209: 2 × (4 × 3) ÷ 1
210: 2 × (4 × 3 ÷ 1)
211: 2 × ((4 × 3) ÷ 1)
212: 2 × (4 × (3 ÷ 1))
213: 2 × 4 ×(3 ÷ 1)
214: (2 × 4) × (3 ÷ 1)
215: (3 + 1 + 2) × 4
216: ((3 + 1) + 2) × 4
217: (3 + (1 + 2)) × 4
218: (3 + 1) × (2 + 4)
219: 3 × 1 × 2 × 4
220: (3 × 1) × 2 × 4
221: (3 × 1 × 2) × 4
222: ((3 × 1) × 2) × 4
223: (3 × (1 × 2)) × 4
224: 3 × (1 × 2) × 4
225: 3 × (1 × 2 × 4)
226: 3 × ((1 × 2) × 4)
227: 3 × (1 × (2 × 4))
228: 3 × 1 ×(2 × 4)
229: (3 × 1) × (2 × 4)
230: 3 ÷ 1 × 2 × 4
231: (3 ÷ 1) × 2 × 4
232: (3 ÷ 1 × 2) × 4
233: ((3 ÷ 1) × 2) × 4
234: 3 ÷ 1 ×(2 × 4)
235: (3 ÷ 1) × (2 × 4)
236: (3 ÷ (1 ÷ 2)) × 4
237: 3 ÷ (1 ÷ 2) × 4
238: 3 ÷ (1 ÷ (2 × 4))
239: 3 ÷ (1 ÷ 2 ÷ 4)
240: 3 ÷ ((1 ÷ 2) ÷ 4)
241: (3 + 1) × (4 + 2)
242: 3 × 1 × 4 × 2
243: (3 × 1) × 4 × 2
244: (3 × 1 × 4) × 2
245: ((3 × 1) × 4) × 2
246: (3 × (1 × 4)) × 2
247: 3 × (1 × 4) × 2
248: 3 × (1 × 4 × 2)
249: 3 × ((1 × 4) × 2)
250: 3 × (1 × (4 × 2))
251: 3 × 1 ×(4 × 2)
252: (3 × 1) × (4 × 2)
253: 3 ÷ 1 × 4 × 2
254: (3 ÷ 1) × 4 × 2
255: (3 ÷ 1 × 4) × 2
256: ((3 ÷ 1) × 4) × 2
257: 3 ÷ 1 ×(4 × 2)
258: (3 ÷ 1) × (4 × 2)
259: (3 ÷ (1 ÷ 4)) × 2
260: 3 ÷ (1 ÷ 4) × 2
261: 3 ÷ (1 ÷ (4 × 2))
262: 3 ÷ (1 ÷ 4 ÷ 2)
263: 3 ÷ ((1 ÷ 4) ÷ 2)
264: (3 + 2 + 1) × 4
265: ((3 + 2) + 1) × 4
266: (3 + (2 + 1)) × 4
267: 3 × 2 × 1 × 4
268: (3 × 2) × 1 × 4
269: (3 × 2 × 1) × 4
270: ((3 × 2) × 1) × 4
271: (3 × (2 × 1)) × 4
272: 3 × (2 × 1) × 4
273: 3 × (2 × 1 × 4)
274: 3 × ((2 × 1) × 4)
275: 3 × (2 × (1 × 4))
276: 3 × 2 ×(1 × 4)
277: (3 × 2) × (1 × 4)
278: 3 × 2 ÷ 1 × 4
279: (3 × 2) ÷ 1 × 4
280: (3 × 2 ÷ 1) × 4
281: ((3 × 2) ÷ 1) × 4
282: (3 × (2 ÷ 1)) × 4
283: 3 × (2 ÷ 1) × 4
284: 3 × (2 ÷ 1 × 4)
285: 3 × ((2 ÷ 1) × 4)
286: 3 × (2 ÷ (1 ÷ 4))
287: 3 × 2 ÷(1 ÷ 4)
288: (3 × 2) ÷ (1 ÷ 4)
289: 3 × 2 × 4 × 1
290: (3 × 2) × 4 × 1
291: (3 × 2 × 4) × 1
292: ((3 × 2) × 4) × 1
293: (3 × (2 × 4)) × 1
294: 3 × (2 × 4) × 1
295: 3 × (2 × 4 × 1)
296: 3 × ((2 × 4) × 1)
297: 3 × (2 × (4 × 1))
298: 3 × 2 ×(4 × 1)
299: (3 × 2) × (4 × 1)
300: 3 × 2 × 4 ÷ 1
301: (3 × 2) × 4 ÷ 1
302: (3 × 2 × 4) ÷ 1
303: ((3 × 2) × 4) ÷ 1
304: (3 × (2 × 4)) ÷ 1
305: 3 × (2 × 4) ÷ 1
306: 3 × (2 × 4 ÷ 1)
307: 3 × ((2 × 4) ÷ 1)
308: 3 × (2 × (4 ÷ 1))
309: 3 × 2 ×(4 ÷ 1)
310: (3 × 2) × (4 ÷ 1)
311: 3 × 4 × 1 × 2
312: (3 × 4) × 1 × 2
313: (3 × 4 × 1) × 2
314: ((3 × 4) × 1) × 2
315: (3 × (4 × 1)) × 2
316: 3 × (4 × 1) × 2
317: 3 × (4 × 1 × 2)
318: 3 × ((4 × 1) × 2)
319: 3 × (4 × (1 × 2))
320: 3 × 4 ×(1 × 2)
321: (3 × 4) × (1 × 2)
322: 3 × 4 ÷ 1 × 2
323: (3 × 4) ÷ 1 × 2
324: (3 × 4 ÷ 1) × 2
325: ((3 × 4) ÷ 1) × 2
326: (3 × (4 ÷ 1)) × 2
327: 3 × (4 ÷ 1) × 2
328: 3 × (4 ÷ 1 × 2)
329: 3 × ((4 ÷ 1) × 2)
330: 3 × (4 ÷ (1 ÷ 2))
331: 3 × 4 ÷(1 ÷ 2)
332: (3 × 4) ÷ (1 ÷ 2)
333: 3 × 4 × 2 × 1
334: (3 × 4) × 2 × 1
335: (3 × 4 × 2) × 1
336: ((3 × 4) × 2) × 1
337: (3 × (4 × 2)) × 1
338: 3 × (4 × 2) × 1
339: 3 × (4 × 2 × 1)
340: 3 × ((4 × 2) × 1)
341: 3 × (4 × (2 × 1))
342: 3 × 4 ×(2 × 1)
343: (3 × 4) × (2 × 1)
344: 3 × 4 × 2 ÷ 1
345: (3 × 4) × 2 ÷ 1
346: (3 × 4 × 2) ÷ 1
347: ((3 × 4) × 2) ÷ 1
348: (3 × (4 × 2)) ÷ 1
349: 3 × (4 × 2) ÷ 1
350: 3 × (4 × 2 ÷ 1)
351: 3 × ((4 × 2) ÷ 1)
352: 3 × (4 × (2 ÷ 1))
353: 3 × 4 ×(2 ÷ 1)
354: (3 × 4) × (2 ÷ 1)
355: 4 × (1 + 2 + 3)
356: 4 × ((1 + 2) + 3)
357: 4 × (1 + (2 + 3))
358: 4 × 1 × 2 × 3
359: (4 × 1) × 2 × 3
360: (4 × 1 × 2) × 3
361: ((4 × 1) × 2) × 3
362: (4 × (1 × 2)) × 3
363: 4 × (1 × 2) × 3
364: 4 × (1 × 2 × 3)
365: 4 × ((1 × 2) × 3)
366: 4 × (1 × (2 × 3))
367: 4 × 1 ×(2 × 3)
368: (4 × 1) × (2 × 3)
369: 4 ÷ 1 × 2 × 3
370: (4 ÷ 1) × 2 × 3
371: (4 ÷ 1 × 2) × 3
372: ((4 ÷ 1) × 2) × 3
373: 4 ÷ 1 ×(2 × 3)
374: (4 ÷ 1) × (2 × 3)
375: (4 ÷ (1 ÷ 2)) × 3
376: 4 ÷ (1 ÷ 2) × 3
377: 4 ÷ (1 ÷ (2 × 3))
378: 4 ÷ (1 ÷ 2 ÷ 3)
379: 4 ÷ ((1 ÷ 2) ÷ 3)
380: 4 × (1 + 3 + 2)
381: 4 × ((1 + 3) + 2)
382: 4 × (1 + (3 + 2))
383: 4 × 1 × 3 × 2
384: (4 × 1) × 3 × 2
385: (4 × 1 × 3) × 2
386: ((4 × 1) × 3) × 2
387: (4 × (1 × 3)) × 2
388: 4 × (1 × 3) × 2
389: 4 × (1 × 3 × 2)
390: 4 × ((1 × 3) × 2)
391: 4 × (1 × (3 × 2))
392: 4 × 1 ×(3 × 2)
393: (4 × 1) × (3 × 2)
394: 4 ÷ 1 × 3 × 2
395: (4 ÷ 1) × 3 × 2
396: (4 ÷ 1 × 3) × 2
397: ((4 ÷ 1) × 3) × 2
398: 4 ÷ 1 ×(3 × 2)
399: (4 ÷ 1) × (3 × 2)
400: (4 ÷ (1 ÷ 3)) × 2
401: 4 ÷ (1 ÷ 3) × 2
402: 4 ÷ (1 ÷ (3 × 2))
403: 4 ÷ (1 ÷ 3 ÷ 2)
404: 4 ÷ ((1 ÷ 3) ÷ 2)
405: (4 + 2) × (1 + 3)
406: 4 × (2 + 1 + 3)
407: 4 × ((2 + 1) + 3)
408: 4 × (2 + (1 + 3))
409: 4 × 2 × 1 × 3
410: (4 × 2) × 1 × 3
411: (4 × 2 × 1) × 3
412: ((4 × 2) × 1) × 3
413: (4 × (2 × 1)) × 3
414: 4 × (2 × 1) × 3
415: 4 × (2 × 1 × 3)
416: 4 × ((2 × 1) × 3)
417: 4 × (2 × (1 × 3))
418: 4 × 2 ×(1 × 3)
419: (4 × 2) × (1 × 3)
420: 4 × 2 ÷ 1 × 3
421: (4 × 2) ÷ 1 × 3
422: (4 × 2 ÷ 1) × 3
423: ((4 × 2) ÷ 1) × 3
424: (4 × (2 ÷ 1)) × 3
425: 4 × (2 ÷ 1) × 3
426: 4 × (2 ÷ 1 × 3)
427: 4 × ((2 ÷ 1) × 3)
428: 4 × (2 ÷ (1 ÷ 3))
429: 4 × 2 ÷(1 ÷ 3)
430: (4 × 2) ÷ (1 ÷ 3)
431: (4 + 2) × (3 + 1)
432: 4 × (2 + 3 + 1)
433: 4 × ((2 + 3) + 1)
434: 4 × (2 + (3 + 1))
435: 4 × 2 × 3 × 1
436: (4 × 2) × 3 × 1
437: (4 × 2 × 3) × 1
438: ((4 × 2) × 3) × 1
439: (4 × (2 × 3)) × 1
440: 4 × (2 × 3) × 1
441: 4 × (2 × 3 × 1)
442: 4 × ((2 × 3) × 1)
443: 4 × (2 × (3 × 1))
444: 4 × 2 ×(3 × 1)
445: (4 × 2) × (3 × 1)
446: 4 × 2 × 3 ÷ 1
447: (4 × 2) × 3 ÷ 1
448: (4 × 2 × 3) ÷ 1
449: ((4 × 2) × 3) ÷ 1
450: (4 × (2 × 3)) ÷ 1
451: 4 × (2 × 3) ÷ 1
452: 4 × (2 × 3 ÷ 1)
453: 4 × ((2 × 3) ÷ 1)
454: 4 × (2 × (3 ÷ 1))
455: 4 × 2 ×(3 ÷ 1)
456: (4 × 2) × (3 ÷ 1)
457: 4 × (3 + 1 + 2)
458: 4 × ((3 + 1) + 2)
459: 4 × (3 + (1 + 2))
460: 4 × 3 × 1 × 2
461: (4 × 3) × 1 × 2
462: (4 × 3 × 1) × 2
463: ((4 × 3) × 1) × 2
464: (4 × (3 × 1)) × 2
465: 4 × (3 × 1) × 2
466: 4 × (3 × 1 × 2)
467: 4 × ((3 × 1) × 2)
468: 4 × (3 × (1 × 2))
469: 4 × 3 ×(1 × 2)
470: (4 × 3) × (1 × 2)
471: 4 × 3 ÷ 1 × 2
472: (4 × 3) ÷ 1 × 2
473: (4 × 3 ÷ 1) × 2
474: ((4 × 3) ÷ 1) × 2
475: (4 × (3 ÷ 1)) × 2
476: 4 × (3 ÷ 1) × 2
477: 4 × (3 ÷ 1 × 2)
478: 4 × ((3 ÷ 1) × 2)
479: 4 × (3 ÷ (1 ÷ 2))
480: 4 × 3 ÷(1 ÷ 2)
481: (4 × 3) ÷ (1 ÷ 2)
482: 4 × (3 + 2 + 1)
483: 4 × ((3 + 2) + 1)
484: 4 × (3 + (2 + 1))
485: 4 × 3 × 2 × 1
486: (4 × 3) × 2 × 1
487: (4 × 3 × 2) × 1
488: ((4 × 3) × 2) × 1
489: (4 × (3 × 2)) × 1
490: 4 × (3 × 2) × 1
491: 4 × (3 × 2 × 1)
492: 4 × ((3 × 2) × 1)
493: 4 × (3 × (2 × 1))
494: 4 × 3 ×(2 × 1)
495: (4 × 3) × (2 × 1)
496: 4 × 3 × 2 ÷ 1
497: (4 × 3) × 2 ÷ 1
498: (4 × 3 × 2) ÷ 1
499: ((4 × 3) × 2) ÷ 1
500: (4 × (3 × 2)) ÷ 1
501: 4 × (3 × 2) ÷ 1
502: 4 × (3 × 2 ÷ 1)
503: 4 × ((3 × 2) ÷ 1)
504: 4 × (3 × (2 ÷ 1))
505: 4 × 3 ×(2 ÷ 1)
506: (4 × 3) × (2 ÷ 1)

符号数字只能用一次，而且必须用？笑话！

1*2*3*4，很简单。

请把问题补充下！ 你确定有解？？？？？
我不想浪费精力

废人！！！！！！！有閪解啊!!!!!