用加,减,乘,除和括号连接各数,使等式成立.1 2 3 4 5 =1
问题描述：
用加,减,乘,除和括号连接各数,使等式成立.1 2 3 4 5 =1
不能用负数.急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急急···································································································································································································································
答
（1 ×2- 3） ×4 +5 =1不能用负数（1 ÷2×3×4） -5 =1