5, 7, 7, 11的24点答案:1: (5 - 11 ÷ 7) × 72: (5 - (11 ÷ 7)) × 73: 7 × (5 - 11 ÷ 7)4: 7 × (5 - (11 ÷ 7))
算不了
(-5+11)×(7-3)=(-5+11)×4=6×4=24