大家来算24点

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