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4 5 7 7算24点

过程: 4×(7÷7+5)=24 5×7-4-7=24

(4+7-5)*4 (4+(7-5))*4 ((4+7)-5)*4 (4+7-5)*4 (4+(7-5))*4

7-5=2 2×10+4=24

(4-7)*(5-13) (5+(7*13))/4 (5-13)*(4-7) (5+(13*7))/4 (7-4)*(13-5) ((7*13)+5)/4 (13-5)*(7-4) ((13*7)+5)/4

(7+5)×(4—2)

(5+7)÷4×8=24

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

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

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