2,3,8,9 24点怎么算?

1:8 ÷ 2 ×(9 - 3) 2:(8 ÷ 2) × (9 - 3) 3:8 ÷ (2 ÷ (9 - 3)) 4:8 × (9 - 2 × 3) 5:8 × (9 - (2 × 3)) 6:8 × (9 - 3 × 2) 7:8 × (9 - (3 × 2)) 8:(8 × (9 - 3)) ÷ 2 9:8 × (9 - 3) ÷ 2 10:8 × ((9 - 3) ÷ 2) 11:(9 - 2 × 3) × 8 12:(9 - (2 × 3)) × 8 13:(9 - 3 × 2) × 8 14:(9 - (3 × 2)) × 8 15:(9 - 3) ÷ 2 × 8 16:((9 - 3) ÷ 2) × 8 17:(9 - 3) ÷ (2 ÷ 8) 18:(9 - 3) × 8 ÷ 2 19:((9 - 3) × 8) ÷ 2 20:(9 - 3) × (8 ÷ 2)