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用1,2,4,7算24点

1, 2, 4, 7的24点答案: 1: (1 - 2 + 7) × 4 2: ((1 - 2) + 7) × 4 3: (1 - (2 - 7)) × 4 4: (1 + 4 + 7) × 2 5: ((1 + 4) + 7) × 2 6: (1 + (4 + 7)) × 2 7: (1 + 7 - 2) × 4 8: ((1 + 7) - 2) × 4 9: (1 + (7 - 2)) × 4 10: (1 + 7 + 4) × 2 1...

(4+7+1)乘二

解法如下: (1)2×2×(7-1)=24 (2)2×(7-1)×2=24 (3)(7-1)×2×2=24 (4)(2+2)×(7-1)=24 (5)(7-1)×(2+2)=24

1, 2, 6, 7的24点答案: 1: (1 + 7) ÷ 2 × 6 2: ((1 + 7) ÷ 2) × 6 3: (1 + 7) ÷ (2 ÷ 6) 4: (1 - 7) × (2 - 6) 5: (1 + 7) × 6 ÷ 2 6: ((1 + 7) × 6) ÷ 2 7: (1 + 7) × (6 ÷ 2) 8: (2 - 6) × (1 - 7) 9: 2 × (6 - 1 + 7) 10: 2 × ((6 - 1) + 7)...

因题干条件不完整,不能正常作答。

1: 4 × (7 + 8 - 9) 2: 4 × ((7 + 8) - 9) 3: 4 × (7 + (8 - 9)) 4: 4 × (7 - 9 + 8) 5: 4 × ((7 - 9) + 8) 6: 4 × (7 - (9 - 8)) 7: 4 × (8 + 7 - 9) 8: 4 × ((8 + 7) - 9) 9: 4 × (8 + (7 - 9)) 10: (4 + 8) × (9 - 7) 11: 4 × (8 - 9 + 7) 12...

数理答疑团为您解答,希望对你有所帮助。 2*8+1+7=24 (7-1)*8/2=24 (1+7)*2+8=24 祝你学习进步,更上一层楼! (*^__^*)

(7-1)×2+12=24

6/(1-3/4)=6/(1/4)=24

如图

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