Filter in WHERE Postgresql

Good morning folks, next, I'm doing a standardization of some records here in the company. So there are 2 tables.

Table A (old records) columns as:

id_alvara | logradouro
1         | Rua Sete de Setembro n° 200
2         | Rua tal 300
3         | Rua de Teste n555
4         | Rua nada 2000

Table B (new records) columns as:

id_logradouro | logradouro | num
1             | Rua Tal    | 220
2             | Rua de Test| 555

What do you get is the following, how do I make a filter in table A to search for the exact number?

For example, in a form, the user is typing the number 220, has to return to it the correct record 1?

I used the WHERE a like (... where like '% 200%') but this returns any number that has 200, and that does not solve it.

How do I filter and shoot all the letters?

I think it gave to understand, I wait for return and thank and who to answer! Hugs

EDIT1: Highlighting the problem, sometimes the user, when he registered his address, put his residence number like this: n ° 220 or n220 etc, this prevents me from using the 220 directly.