1:(2-(-2) ÷ 3) × 9
2:[(2- (-2)] × (9 - 3)
3:9 × (2 ÷ 3 -(-2))
4:9 × ((2 ÷ 3) -(-2))
5:(9 - 3) × (2-(-2))
希望对你有所帮助,