同步推降级后资料恢复:脑筋急转弯数字5

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/06 03:46:06
用上+,-,*,/各一次,不用括号,与一位数4,5,6,7,8可以编出多少道得数为正整数的算式?

请注明每一道题的得数的。谢谢了。

结果包括0,共有224个:
4*6/8+5-7=1,4*6/8-5+7=5,4*6/8+7-5=5,4*6/8-7+5=1,4/8*6+5-7=1
4/8*6-5+7=5,4/8*6+7-5=5,4/8*6-7+5=1,5+4*6/8-7=1,5-4*6/8+7=9
5+4/8*6-7=1,5-4/8*6+7=9,5/4*8+6-7=9,5/4*8-6+7=11,5/4*8+7-6=11
5/4*8-7+6=9,5+6*4/8-7=1,5+6/4*8-7=10,5-6*4/8+7=9,5-6/4*8+7=0
5-6+7/4*8=13,5+6*7-8/4=45,5-6+7*8/4=13,5*6+7-8/4=35,5*6-7+8/4=25
5+6*8/4-7=10,5+6/8*4-7=1,5-6+8/4*7=13,5-6*8/4+7=0,5-6/8*4+7=9
5*6+8/4-7=25,5*6-8/4+7=35,5-6+8*7/4=13,5+7-4*6/8=9,5-7+4*6/8=1
5+7-4/8*6=9,5+7/4*8-6=13,5-7+4/8*6=1,5+7-6*4/8=9,5+7-6/4*8=0
5-7+6*4/8=1,5-7+6/4*8=10,5+7-6*8/4=0,5+7-6/8*4=9,5+7*6-8/4=45
5-7+6*8/4=10,5-7+6/8*4=1,5*7+6-8/4=39,5*7-6+8/4=31,5+7-8/4*6=0
5+7*8/4-6=13,5-7+8/4*6=10,5*7+8/4-6=31,5*7-8/4+6=39,5+7-8*6/4=0
5-7+8*6/4=10,5+8/4*6-7=10,5-8/4+6*7=45,5-8/4*6+7=0,5*8/4+6-7=9
5*8/4-6+7=11,5+8/4*7-6=13,5-8/4+7*6=45,5*8/4+7-6=11,5*8/4-7+6=9
5+8*6/4-7=10,5-8*6/4+7=0,5+8*7/4-6=13,6*4/8+5-7=1,6*4/8-5+7=5
6/4*8+5-7=10,6/4*8-5+7=14,6*4/8+7-5=5,6*4/8-7+5=1,6/4*8+7-5=14
6/4*8-7+5=10,6+5/4*8-7=9,6-5/4*8+7=3,6-5+7/4*8=15,6+5*7-8/4=39
6-5+7*8/4=15,6*5+7-8/4=35,6*5-7+8/4=25,6+5*8/4-7=9,6-5+8/4*7=15
6-5*8/4+7=3,6*5+8/4-7=25,6*5-8/4+7=35,6-5+8*7/4=15,6+7/4*8-5=15
6+7-5/4*8=3,6-7+5/4*8=9,6+7-5*8/4=3,6+7*5-8/4=39,6-7+5*8/4=9
6*7+5-8/4=45,6*7-5+8/4=39,6+7-8/4*5=3,6+7*8/4-5=15,6-7+8/4*5=9
6*7+8/4-5=39,6*7-8/4+5=45,6+7-8*5/4=3,6-7+8*5/4=9,6+8/4*5-7=9
6-8/4+5*7=39,6-8/4*5+7=3,6*8/4+5-7=10,6*8/4-5+7=14,6/8*4+5-7=1
6/8*4-5+7=5,6+8/4*7-5=15,6-8/4+7*5=39,6*8/4+7-5=14,6*8/4-7+5=10
6/8*4+7-5=5,6/8*4-7+5=1,6+8*5/4-7=9,6-8*5/4+7=3,6+8*7/4-5=15
7+4*6/8-5=5,7-4*6/8+5=9,7/4*8+5-6=13,7/4*8-5+6=15,7+4/8*6-5=5
7-4/8*6+5=9,7/4*8+6-5=15,7/4*8-6+5=13,7+5-4*6/8=9,7-5+4*6/8=5
7+5-4/8*6=9,7+5/4*8-6=11,7-5+4/8*6=5,7-5/4*8+6=3,7+5-6*4/8=9
7+5-6/4*8=0,7-5+6*4/8=5,7-5+6/4*8=14,7+5-6*8/4=0,7+5-6/8*4=9
7+5*6-8/4=35,7-5+6*8/4=14,7-5+6/8*4=5,7*5+6-8/4=39,7*5-6+8/4=31
7+5-8/4*6=0,7+5*8/4-6=11,7-5+8/4*6=14,7-5*8/4+6=3,7*5+8/4-6=31
7*5-8/4+6=39,7+5-8*6/4=0,7-5+8*6/4=14,7+6*4/8-5=5,7+6/4*8-5=14
7-6*4/8+5=9,7-6/4*8+5=0,7+6-5/4*8=3,7-6+5/4*8=11,7+6-5*8/4=3
7+6*5-8/4=35,7-6+5*8/4=11,7*6+5-8/4=45,7*6-5+8/4=39,7+6-8/4*5=3
7+6*8/4-5=14,7+6/8*4-5=5,7-6+8/4*5=11,7-6*8/4+5=0,7-6/8*4+5=9
7*6+8/4-5=39,7*6-8/4+5=45,7+6-8*5/4=3,7-6+8*5/4=11,7+8/4*5-6=11
7-8/4+5*6=35,7-8/4*5+6=3,7*8/4+5-6=13,7*8/4-5+6=15,7+8/4*6-5=14
7-8/4+6*5=35,7-8/4*6+5=0,7*8/4+6-5=15,7*8/4-6+5=13,7+8*5/4-6=11
7-8*5/4+6=3,7+8*6/4-5=14,7-8*6/4+5=0,8/4+5*6-7=25,8/4-5+6*7=39
8/4*5+6-7=9,8/4*5-6+7=11,8/4+5*7-6=31,8/4-5+7*6=39,8/4*5+7-6=11
8/4*5-7+6=9,8/4+6*5-7=25,8/4-6+5*7=31,8/4*6+5-7=10,8/4*6-5+7=14
8/4+6*7-5=39,8/4-6+7*5=31,8/4*6+7-5=14,8/4*6-7+5=10,8/4+7*5-6=31
8/4-7+5*6=25,8/4*7+5-6=13,8/4*7-5+6=15,8/4+7*6-5=39,8/4-7+6*5=25
8/4*7+6-5=15,8/4*7-6+5=13,8*5/4+6-7=9,8*5/4-6+7=11,8*5/4+7-6=11
8*5/4-7+6=9,8*6/4+5-7=10,8*6/4-5+7=14,8*6/4+7-5=14,8*6/4-7+5=10
8*7/4+5-6=13,8*7/4-5+6=15,8*7/4+6-5=15,8*7/4-6+5=13