Translation:Go to the market first, and then go to the shop
this sentence doesn't need "and" in order to be correct, though "and" sounds ok, both should be accepted
I got the sentence wrong because I didn't put an "and" after market and in your translation above you do not even have an "and"
For the first time in my experience with Duolingo, I had my answer rejected because of a missing comma! And to make it worse, a comma is not really necessary before "and" in this sentence...