Question

1,3,9,10；1,5,5,5；2,7,10,10；2,7,8,8如何算24点

Answer 1

共有2种方法！
(1+10)*3-9=24
(10+1)*3-9=24

共有2种方法！
(5-1/5)*5=24
5*(5-1/5)=24

共有6种方法！
(2-10)*(7-10)=24
(7+10)*2-10=24
(7-10)*(2-10)=24
(10-2)*(10-7)=24
(10+7)*2-10=24
(10-7)*(10-2)=24

共有12种方法！
(2-7+8)*8=24
(2+8-7)*8=24
(7-8/2)*8=24
(7*8-8)/2=24
(8+2-7)*8=24
8*(2-7+8)=24
8*(2+8-7)=24
(8-7+2)*8=24
(8*7-8)/2=24
8*(7-8/2)=24
8*(8+2-7)=24
8*(8-7+2)=24

Answer 2

1.3.9..10的解法如下：
((1+10)*3)-9
(3*(1+10))-9
(3*(10+1))-9
((10+1)*3)-9
----END----
1.555的解法如下：
(5-(1/5))*5
(5-(1/5))*5
5*(5-(1/5))
5*(5-(1/5))
(5-(1/5))*5
(5-(1/5))*5
5*(5-(1/5))
5*(5-(1/5))
(5-(1/5))*5
(5-(1/5))*5
5*(5-(1/5))
5*(5-(1/5))
----END----
2.7.10.10的解法如下：
(2*(7+10))-10
(2*(7+10))-10
(2-10)*(7-10)
(2*(10+7))-10
(2-10)*(7-10)
(2*(10+7))-10
(7-10)*(2-10)
((7+10)*2)-10
(7-10)*(2-10)
((7+10)*2)-10
(10-2)*(10-7)
((10+7)*2)-10
(10-7)*(10-2)
(10-2)*(10-7)
((10+7)*2)-10
(10-7)*(10-2)
----END----
2.7.8.8的解法如下：
(2-(7-8))*8
((2-7)+8)*8
(2-(7-8))*8
((2-7)+8)*8
((2+8)-7)*8
(2+(8-7))*8
((2+8)-7)*8
(2+(8-7))*8
(7-(8/2))*8
((7*8)-8)/2
(7-(8/2))*8
((7*8)-8)/2
((8+2)-7)*8
(8+(2-7))*8
8*(2-(7-8))
8*((2-7)+8)
8*((2+8)-7)
8*(2+(8-7))
(8-(7-2))*8
((8-7)+2)*8
((8*7)-8)/2
8*(7-(8/2))
8*((8+2)-7)
8*(8+(2-7))
8*(8-(7-2))
8*((8-7)+2)
((8+2)-7)*8
(8+(2-7))*8
8*(2-(7-8))
8*((2-7)+8)
8*((2+8)-7)
8*(2+(8-7))
(8-(7-2))*8
((8-7)+2)*8
((8*7)-8)/2
8*(7-(8/2))
8*((8+2)-7)
8*(8+(2-7))
8*(8-(7-2))
8*((8-7)+2)
----END----

Answer 3

(10+1)×3-9=24
5×(5-1÷5)=24
(10-7)×(10-2)=24
(7-8÷2)×8=24
正解

Answer 4

(10+1)×3-9=24
5×(5-1÷5)=24
(10-7)×(10-2)=24
(7-8÷2)×8=24