好大的计算量,填三个符号共有64种情况,分别是:+++,++-,++*,++/,+-,+--,+-*,+-/,+*+,+*-,+**,+*/,+/+,+/-,+/*,+//,-++,-+-,-+*,-+/,--,---,--*,--/,-*+,-*-,-**,-*/,-/+,-/-,-/*,-//,*++,*+-,*+*,*+/,*-,*--,*-*,*-/,**+,**-,***,**/,*/+,*/-,*/*,*//,/++,/+-,/+*,/+/,/-,/--,/-*,/-/,/*+,/*-,/**,/*/,//+,//-,//*,///,其中很多没有解,有解的有29种形式。
1、-++解答数量:240
123-46+5+7=89,123-46+7+5=89,123-49+5+7=86,123-49+7+5=86,123-56+4+8=79
123-56+8+4=79,123-59+4+8=76,123-59+8+4=76,123-76+4+8=59,123-76+8+4=59
……
173-96+2+5=84,173-96+5+2=84,175-84+2+3=96,175-84+3+2=96,175-86+2+3=94
175-86+3+2=94,175-94+2+3=86,175-94+3+2=86,175-96+2+3=84,175-96+3+2=84
2、-+-解答数量:240
126-43+9-5=87,126-43+9-7=85,126-45+9-3=87,126-45+9-7=83,126-47+9-3=85
126-47+9-5=83,126-53+9-4=78,126-53+9-8=74,126-54+9-3=78,126-54+9-8=73
……
176-83+4-2=95,176-83+4-5=92,176-85+4-2=93,176-85+4-3=92,176-92+4-3=85
176-92+4-5=83,176-93+4-2=85,176-93+4-5=82,176-95+4-2=83,176-95+4-3=82
3、-+*解答数量:136
124-56+3*7=89,124-56+7*3=89,124-59+3*7=86,124-59+7*3=86,124-86+3*7=59
124-86+7*3=59,124-89+3*7=56,124-89+7*3=56,127-53+4*6=98,127-53+6*4=98
……
173-86+2*4=95,173-86+4*2=95,173-95+2*4=86,173-95+4*2=86,173-96+2*4=85
173-96+4*2=85
4、-+/解答数量:32
125-48+6/3=79,125-49+6/3=78,125-78+6/3=49,125-79+6/3=48,134-58+6/2=79
134-59+6/2=78,134-78+6/2=59,134-79+6/2=58,137-45+8/2=96,137-46+8/2=95
137-95+8/2=46,137-96+8/2=45,143-57+6/2=89,143-59+6/2=87,143-87+6/2=59
143-89+6/2=57,146-53+8/2=97,146-57+8/2=93,146-93+8/2=57,146-97+8/2=53
158-63+4/2=97,158-67+4/2=93,158-93+4/2=67,158-97+4/2=63,164-73+8/2=95
164-75+8/2=93,164-93+8/2=75,164-95+8/2=73,176-83+4/2=95,176-85+4/2=93
176-93+4/2=85,176-95+4/2=83
5、--+解答数量:240
126-43-5+9=87,126-43-7+9=85,126-45-3+9=87,126-45-7+9=83,126-47-3+9=85
126-47-5+9=83,126-53-4+9=78,126-53-8+9=74,126-54-3+9=78,126-54-8+9=73
……
176-83-2+4=95,176-83-5+4=92,176-85-2+4=93,176-85-3+4=92,176-92-3+4=85
176-92-5+4=83,176-93-2+4=85,176-93-5+4=82,176-95-2+4=83,176-95-3+4=82
6、---解答数量:288
126-34-5-8=79,126-34-5-9=78,126-34-8-5=79,126-34-8-9=75,126-34-9-5=78
126-34-9-8=75,126-35-4-8=79,126-35-4-9=78,126-35-8-4=79,126-35-8-9=74
……
162-97-8-3=54,162-97-8-4=53,162-98-3-4=57,162-98-3-7=54,162-98-4-3=57
162-98-4-7=53,162-98-7-3=54,162-98-7-4=53
7、--*解答数量:320
126-37-5*8=49,126-37-8*5=49,126-39-5*8=47,126-39-8*5=47,126-47-5*8=39
126-47-8*5=39,126-49-5*8=37,126-49-8*5=37,127-36-4*8=59,127-36-8*4=59
……
214-96-5*7=83,214-96-7*5=83,215-73-6*8=94,215-73-8*6=94,215-74-6*8=93
215-74-8*6=93,215-93-6*8=74,215-93-8*6=74,215-94-6*8=73,215-94-8*6=73
8、--/解答数量:20
126-45-9/3=78,126-48-9/3=75,126-75-9/3=48,126-78-9/3=45,137-45-6/2=89
137-49-6/2=85,137-85-6/2=49,137-89-6/2=45,139-62-8/4=75,139-65-8/4=72
139-72-8/4=65,139-75-8/4=62,157-62-8/4=93,157-63-8/4=92,157-92-8/4=63
157-93-8/4=62,162-74-9/3=85,162-75-9/3=84,162-84-9/3=75,162-85-9/3=74
1、-++解答数量:240
123-46+5+7=89,123-46+7+5=89,123-49+5+7=86,123-49+7+5=86,123-56+4+8=79
123-56+8+4=79,123-59+4+8=76,123-59+8+4=76,123-76+4+8=59,123-76+8+4=59
……
173-96+2+5=84,173-96+5+2=84,175-84+2+3=96,175-84+3+2=96,175-86+2+3=94
175-86+3+2=94,175-94+2+3=86,175-94+3+2=86,175-96+2+3=84,175-96+3+2=84
2、-+-解答数量:240
126-43+9-5=87,126-43+9-7=85,126-45+9-3=87,126-45+9-7=83,126-47+9-3=85
126-47+9-5=83,126-53+9-4=78,126-53+9-8=74,126-54+9-3=78,126-54+9-8=73
……
176-83+4-2=95,176-83+4-5=92,176-85+4-2=93,176-85+4-3=92,176-92+4-3=85
176-92+4-5=83,176-93+4-2=85,176-93+4-5=82,176-95+4-2=83,176-95+4-3=82
3、-+*解答数量:136
124-56+3*7=89,124-56+7*3=89,124-59+3*7=86,124-59+7*3=86,124-86+3*7=59
124-86+7*3=59,124-89+3*7=56,124-89+7*3=56,127-53+4*6=98,127-53+6*4=98
……
173-86+2*4=95,173-86+4*2=95,173-95+2*4=86,173-95+4*2=86,173-96+2*4=85
173-96+4*2=85
4、-+/解答数量:32
125-48+6/3=79,125-49+6/3=78,125-78+6/3=49,125-79+6/3=48,134-58+6/2=79
134-59+6/2=78,134-78+6/2=59,134-79+6/2=58,137-45+8/2=96,137-46+8/2=95
137-95+8/2=46,137-96+8/2=45,143-57+6/2=89,143-59+6/2=87,143-87+6/2=59
143-89+6/2=57,146-53+8/2=97,146-57+8/2=93,146-93+8/2=57,146-97+8/2=53
158-63+4/2=97,158-67+4/2=93,158-93+4/2=67,158-97+4/2=63,164-73+8/2=95
164-75+8/2=93,164-93+8/2=75,164-95+8/2=73,176-83+4/2=95,176-85+4/2=93
176-93+4/2=85,176-95+4/2=83
5、--+解答数量:240
126-43-5+9=87,126-43-7+9=85,126-45-3+9=87,126-45-7+9=83,126-47-3+9=85
126-47-5+9=83,126-53-4+9=78,126-53-8+9=74,126-54-3+9=78,126-54-8+9=73
……
176-83-2+4=95,176-83-5+4=92,176-85-2+4=93,176-85-3+4=92,176-92-3+4=85
176-92-5+4=83,176-93-2+4=85,176-93-5+4=82,176-95-2+4=83,176-95-3+4=82
6、---解答数量:288
126-34-5-8=79,126-34-5-9=78,126-34-8-5=79,126-34-8-9=75,126-34-9-5=78
126-34-9-8=75,126-35-4-8=79,126-35-4-9=78,126-35-8-4=79,126-35-8-9=74
……
162-97-8-3=54,162-97-8-4=53,162-98-3-4=57,162-98-3-7=54,162-98-4-3=57
162-98-4-7=53,162-98-7-3=54,162-98-7-4=53
7、--*解答数量:320
126-37-5*8=49,126-37-8*5=49,126-39-5*8=47,126-39-8*5=47,126-47-5*8=39
126-47-8*5=39,126-49-5*8=37,126-49-8*5=37,127-36-4*8=59,127-36-8*4=59
……
214-96-5*7=83,214-96-7*5=83,215-73-6*8=94,215-73-8*6=94,215-74-6*8=93
215-74-8*6=93,215-93-6*8=74,215-93-8*6=74,215-94-6*8=73,215-94-8*6=73
8、--/解答数量:20
126-45-9/3=78,126-48-9/3=75,126-75-9/3=48,126-78-9/3=45,137-45-6/2=89
137-49-6/2=85,137-85-6/2=49,137-89-6/2=45,139-62-8/4=75,139-65-8/4=72
139-72-8/4=65,139-75-8/4=62,157-62-8/4=93,157-63-8/4=92,157-92-8/4=63
157-93-8/4=62,162-74-9/3=85,162-75-9/3=84,162-84-9/3=75,162-85-9/3=74