5,9,2,10的24点答案：1:9 - 5 + 2 × 102:(9 - 5) + 2 × 103:9 - 5 +(2 × 10)4:(9 - 5) + (2 × 10)5:9 - (5 - 2 × 10)6:9 - (5 - (2 × 10))7:9 - 5 + 10 × 28:(9 - 5) + 10 × 29:9 - 5 +(10 × 2)10:(9 - 5) ...