"I have bread and you have salt."

Translation: Já mám chléb a ty máš sůl.

[ehparrish]

Why are the já and ty required here?

[Paul440375]

When the subject changes within the sentence (or in the following sentence), we use the pronouns so that it is clear who we talk about.

[teabeadle]

The correction that I was given was "mám chléb a ty sůl." Is that really correct, i.e., can one omit the máš here?

[BoneheadBass]

Yes, I believe that "máš" can be omitted here and, funnily, I almost wrote what you got for your "correction." :-)

UPDATE 4 Jul 2018 ---------- I just used "já mám chléb a ty sůl" and it was accepted.