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用2,4,4,1算24点

(2+4)×4×1=24

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...

(1+ 2 )x(2 x4)=3x8=24 (1+ 2 )x4x2=1 2x2=2 4

如下: 4x(7+1-2)=24 2x(1+4+7)=24

1. 4×[2+﹙5-1﹚] 2. [﹙5+2﹚-1]×4 3. 4×[2-﹙1-5﹚]

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

根据题干分析可得:4×8+2-10,=32+2-10,=24,10×2+8-4,=20+8-4,=24.故答案为:4×8+2-10;10×2+8-4.

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

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

因题干条件不完整,不能正常作答。

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