Let's talk means "let's talk about something", let's talk about something and Let's not talk about something.
Example:
Let's talk about that first.
First, let's talk about this.
So let's talk about what you can do for me.
Let's talk about what you can do for me.
Let's not talk about the past. Let's just let it go.
Let's not talk about the past, let go of what should be put down.
Dialogue:
Let's talk about tomorrow's plan.
Let's talk about tomorrow's plan.
I really want to play jet skiing.
I really want to play glider.
Let's talk; Let's talk means to discuss and talk.
Extended data
Usage of talk:
The basic meaning of talking is "talking, talking; "Talk" refers to the exchange of opinions, ideas, news, etc. By talking. Extension can be interpreted as "expressing ideas, providing information", "telling the inside story" and "gossiping"
Talk can be used as a transitive verb or an intransitive verb. When used as a transitive verb, it can be used as an object with a noun or pronoun, or as a compound object with an adjective or prepositional phrase as a complement.
Talk can sometimes be used as a copula followed by adjectives, such as big, sensible, silly, wild and funny.
Talk can be used to speak a language, which is equivalent to speaking. When talk is interpreted as "speaking", its object usually does not refer to people's words, but often expresses a whole theme with business, philosophy, politics and so on as the objects.