武周王朝机构:脑筋转弯弯:谁会?

来源:百度文库 编辑:高校问答 时间:2024/05/03 19:47:06
用上+,-,*,/各一次,不用括号,不改变123456789的顺序,能够写出多少道得数为正整数的算式?

请给出每道题的得数。谢谢了。

共有113个算式:
1-2/3*45+6789=6760,1-2/3*456+789=486,1+2/3*45678-9=30444
1-2+3*45678/9=15225,1/2*34-5+6789=6801,1/2*34-56+789=750
1/2*34+567-89=495,1+2/34*5678-9=326,1/2*34+5678-9=5686
1-2*345/6+789=675,1-2+345*678/9=25989,1/2*3456+7-89=1646
1/2*3456-7+89=1810,1-2+3456*78/9=29951,1/2*3456+78-9=1797
1/2*3456-78+9=1659,1-23/4*56+789=468,1-23+45*678/9=3368
1-23+456*78/9=3930,1-234*5/6+789=595,1+234*56/7-89=1784
1-234+56/7*89=479,1*234+56/7-89=153,1*234-56/7+89=315
1+234*56/78-9=160,1-234+567*8/9=271,1+2345*6/7-89=1922
1+2345-6*78/9=2294,1+2345/6*78-9=30477,1+2345/67*8-9=272
1-2345/67+8*9=38,1*2345/67+8-9=34,1*2345/67-8+9=36
1+23456*7/8-9=20516,12*3/4-5+6789=6793,12/3-4+5*6789=33945
12/3-4*5+6789=6773,12/3*4-5+6789=6800,12-3/4*56+789=759
12*3/4-56+789=742,12/3-4+56*789=44184,12/3-4*56+789=569
12/3*4-56+789=749,12*3/4+567-89=487,12/3+4*567-89=2183
12/3-4+567*89=50463,12/3*4+567-89=494,12*3/4+5678-9=5678
12/3+4*5678-9=22707,12/3-4+5678*9=51102,12/3*4+5678-9=5685
12/3-45+6*789=4693,12/3-45*6+789=523,12/3*45-6+789=963
12/3+45*67-89=2930,12/3-45+67*89=5922,12/3*45+67-89=158
12/3*45-67+89=202,12-3+45*678/9=3399,12/3+45*678-9=30505
12/3-45+678*9=6061,12/3*45+678-9=849,12/3+456*7-89=3107
12/3-456+7*89=171,12/3*456+7-89=1742,12/3*456-7+89=1906
12-3+456*78/9=3961,12/3+456*78-9=35563,12/3-456+78*9=250
12/3*456+78-9=1893,12/3*456-78+9=1755,12/3+4567-8*9=4499
12/3+4567*8-9=36531,12/3*4567+8-9=18267,12/3*4567-8+9=18269
12+34*56/7-89=195,12-34+56/7*89=690,12*34+56/7-89=327
12*34-56/7+89=489,12-34+567*8/9=482,12*345/6+7-89=608
12*345/6-7+89=772,12+345-6*78/9=305,12+345/6*78-9=4488
12*345/6+78-9=759,12*345/6-78+9=621,12+3456*7/8-9=3027
123+4*56/7-89=66,123-4+56/7*89=831,123-4*56/7+89=180
123*4+56/7-89=411,123*4-56/7+89=573,123/4*56+7-89=1640
123/4*56-7+89=1804,123/4*56+78-9=1791,123/4*56-78+9=1653
123-4+567*8/9=623,123+45-6*78/9=116,123+45/6*78-9=699
123-45+6*78/9=130,123+456*7/8-9=513,1234+5-6*78/9=1187
1234+5/6*78-9=1290,1234-5+6*78/9=1281,1234-5/6*78+9=1178
1234+56*7/8-9=1274,1234+56/7-8*9=1170,1234+56/7*8-9=1289
1234-56*7/8+9=1194,1234-56/7+8*9=1298,1234-56/7*8+9=1179
1234*56/7+8-9=9871,1234*56/7-8+9=9873

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