mainanbaakaado to zairyuukaado o tsukau.

I use my My Number card and residence card.

Breakdown of mainanbaakaado to zairyuukaado o tsukau.

• を: direct object particle
• と: noun-connector particle
• 使つかう: to use
• マイナンバーカード: a My Number card

Questions & Answers about mainanbaakaado to zairyuukaado o tsukau.

Why is と used here?

Here, と connects two nouns and means and.

So:

マイナンバーカード と 在留カード
= My Number card and residence card

This is one of the most common uses of と. It joins nouns in a complete list.

Does と ever mean with instead of and?

Yes. と can also mean with, but in this sentence it is clearly the and use.

Compare:

友だちと行く = go with a friend
りんごとバナナ = apples and bananas

In マイナンバーカード と 在留カード を 使う, both words before と are objects being used, so and is the natural interpretation.

Why is を used after 在留カード and not after both nouns?