Learn French: Il écrit le numéro sur un papier. - He writes the number on a paper.

This sentence is a review of écrire (to write), which is a completely irregular verb, not a stem-changing verb like the ones in the current lesson. The singular present tense forms are j'écris, tu écris, and il/elle/on écrit. Memorizing these irregular forms is essential since they pop up everywhere!

Why use numéro instead of nombre for 'number'?

In French, un numéro is used for an identification number, like a phone number, room number, or a ticket number. Un nombre is used for a quantity or a mathematical value (like counting or doing math). Since he is writing down a specific identifying number, numéro is the right choice here.

Can you say un papier (a paper) in French? In English, 'paper' is usually uncountable.

Yes! While le papier can refer to the material 'paper' in general, French often uses un papier to simply mean 'a piece of paper' or 'a physical document'. In English, we usually say 'on a piece of paper', but in French, sur un papier is perfectly natural and very common.

Do I pronounce the 't' at the end of écrit?