给你48种1:(5 + 8 - 9) × 62:((5 + 8) - 9) × 63:(5 + (8 - 9)) × 64:(5 - 9 + 8) × 65:((5 - 9) + 8) × 66:(5 - (9 - 8)) × 67:6 × (5 + 8 - 9)8:6 × ((5 + 8) - 9)9:6 × (5 + (8 - 9))10:6 × (5 - 9 + 8...