1 2 4 9怎么算24?

1个回答

1, 2, 4, 9的24点答案：1: (1 + 9) × 2 + 42: ((1 + 9) × 2) + 43: (2 × (1 + 9)) + 44: 2 × (1 + 9) + 45: 2 × (4 - 1 + 9)6: 2 × ((4 - 1) + 9)7: 2 × (4 - (1 - 9))8: 2 × (4 + 9 - 1)9: 2 × (...