巧算24点4782,8443,4973,5555
问题描述：
巧算24点4782,8443,4973,5555
答
4 × 7 - 8 ÷ 2
8 + 4 + 4 × 3
4 + 9 × 3 - 7
5 × 5 - 5 ÷ 5