Translation of "Kartce" in English

Zapisałem sobie jego adres na kartce.

- I put down his address on paper.
- I wrote down his address on a piece of paper.

Proszę napisać odpowiedź na tej kartce.

- Please write the answer on this piece of paper.
- Write the answer on this piece of paper, please.

Jeśli Słońce byłoby wielkości kropki nad "i" na kartce,

if the Sun were the size of a dot of an "I" on a page,