5,6,7,7 (24点)
问题描述:
5,6,7,7 (24点)
答
1:(5 - 7 ÷ 7) × 6
2:(5 - (7 ÷ 7)) × 6
3:6 × (5 - 7 ÷ 7)
4:6 × (5 - (7 ÷ 7))