算24点1,2,4,7

网友回答

4*(7+1-2)=24
2*(1+4+7)=24
======以下答案可供参考======
供参考答案1:
4X（7-2+1）=24
2X（7+4+1）=24
供参考答案2:
(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供参考答案3:1: (1 - 2 + 7) × 42: ((1 - 2) + 7) × 43: (1 - (2 - 7)) × 44: (1 + 4 + 7) × 25: ((1 + 4) + 7) × 26: (1 + (4 + 7)) × 27: (1 + 7 - 2) × 48: ((1 + 7) - 2) × 49: (1 + (7 - 2)) × 410: (1 + 7 + 4) × 211: ((1 + 7) + 4) × 212: (1 + (7 + 4)) × 213: 2 × (1 + 4 + 7)14: 2 × ((1 + 4) + 7)15: 2 × (1 + (4 + 7))16: 2 × (1 + 7 + 4)17: 2 × ((1 + 7) + 4)18: 2 × (1 + (7 + 4))19: 2 × (4 + 1 + 7)20: 2 × ((4 + 1) + 7)21: 2 × (4 + (1 + 7))22: 2 × (4 + 7 + 1)23: 2 × ((4 + 7) + 1)