8.12.4.9的24点怎么算?

8, 12, 4, 9的24点答案：1: 8 ÷ 12 × 4 × 9 2: (8 ÷ 12) × 4 × 9 3: (8 ÷ 12 × 4) × 9 4: ((8 ÷ 12) × 4) × 9 5: 8 ÷ 12 ×(4 × 9)6: (8 ÷ 12) × (4 × 9)7: (8 ÷ (12 ÷ 4)) × 9 8: 8 ÷ (12 ÷ 4)...