500以内带1的自然数

1~99
1,10，11,12……19，21，31，41，51，61，71，81，91；29个
100～199
100个
200～299
类似1～99，共有29个
300～399
29个
400～499
29个
500
0个
一共有29*4+100=216

1,10-19,21,31,41,51,61,71,81,91,100-199,201,210-219,221,231,241,251,261,271,281,291,301,310-319,321,331,341,351,361,371,381,391,401,410-419,421,431,441,451,461,471,481,491.

257