123+1234+12345+123456

123+1234+12345+123456 123+1234+12345+123456+1234567+12345678+123456789 ( 1+12+123+1234+12345++++3%)￥ 1+12+123+1234+12345+******+123456789＝? 1+12+123+1234+12345简便 12+123+1234+12345+123456+1234567= 1234+1234-12345-12345=? 12+123+1234+12345+123456+1234567+12345678+123456789+1234567890=? 1,12,123,1234,12345的通项公式是什么? 1+12+123+1234+12345+123456+123456789=? 1+1+12+123+1234+12345+123456+1234567+12345678+123456789 如何用C打印1 12 123 1234 12345 编写一个程序输出下面的结果.1 1 12 1 12 123 1 12 123 1234 1 12 123 1234 12345 1 1 12 1 12 123 1 12 123 1234 1 12 123 1234 12345 1+123+1234+12345+123456+1234567-1-123-1234.5等于多少 12345 12345 12345 12345: