用加,减,乘,除和括号连接各数,使等式成立.1 2 3 4 5 =1

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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···································································································································································································································

（1 ×2- 3） ×4 +5 =1
再问：不能用负数
再答：（1 ÷2×3×4） -5 =1

用加,减,乘,除和括号连接各数,使等式成立.1 2 3 4 5 =1 9 8 7 6 5 4 3 2 1 =2002.在9~1这些数字中,用加,减,乘,除和括号,使等式成立. 5 5 5 1=24,中间可加、减、乘、除、括号,使等式成立. 在加减乘除小括号中选适当的符号,使等式成立.1 2 3 4 5 6 7 =1 填上运算符号加.减,乘,除使等式成立.(不加小括号) 1 2 3 4 5 6 7 8 9 =99 添上加,减,乘,除,括号,使等式成立5 5 5 5 =4 1、用加、减、乘、除,小括号等使等式成立：填运算符号（加.减.乘.除）使等式成立：1（）2（）3（）4=5 4乘6加24除6减5等于15 添上括号使等式成立 1加2乘3加4乘5加6乘7加8乘9等于303 加括号使等式成立 6加57除以3减2乘5加1=93加上括号使等式成立在算式中添上加、减、乘、除和括号,使等式成立.