Question

1247算24点列出综合算式

Answer 1

4×（7+1-2）=24

Answer 2

1: 4*(1+7-2)=24
2: 2*(4+1+7)=24

Answer 3

(1-(2-7))*4
((1-2)+7)*4
((1+4)+7)*2
(1+(4+7))*2
((1+7)-2)*4
(1+(7-2))*4
((1+7)+4)*2
(1+(7+4))*2
2*((1+4)+7)
2*(1+(4+7))
2*((1+7)+4)
2*(1+(7+4))
2*((4+1)+7)
2*(4+(1+7))
2*((4+7)+1)
2*(4+(7+1))
2*((7+1)+4)
2*(7+(1+4))
2*((7+4)+1)
2*(7+(4+1))
4*(1-(2-7))
4*((1-2)+7)
((4+1)+7)*2
(4+(1+7))*2
4*((1+7)-2)
4*(1+(7-2))
((4+7)+1)*2
(4+(7+1))*2
4*((7+1)-2)
4*(7+(1-2))
4*(7-(2-1))
4*((7-2)+1)
((7+1)-2)*4
(7+(1-2))*4
((7+1)+4)*2
(7+(1+4))*2
(7-(2-1))*4
((7-2)+1)*4
((7+4)+1)*2
(7+(4+1))*2
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