Jeg er sliten etter jobb, så jeg tar på meg pyjamas og tøfler med en gang.

Not exactly.

• sliten means tired, worn out, exhausted
• trøtt means sleepy or drowsy, though it can also mean tired in a more general way

In this sentence, Jeg er sliten etter jobb suggests the speaker feels worn out from work, not just ready to sleep. So sliten is a very natural choice.

Because adjectives in Norwegian change form depending on what they describe.

Here, sliten is used after jeg er and refers to one person. That gives you the ordinary singular form.

A useful comparison:

• Jeg er sliten = I am tired
• Huset er slitent = The house is worn out
• Vi er slitne = We are tired

Also, sliten does not change based on whether the speaker is male or female. Norwegian does not mark that here.

Because etter jobb is the normal idiomatic way to say after work in a general sense.

Norwegian often leaves out the article with common places and activities when speaking generally:

• på jobb = at work
• etter jobb = after work
• på skole or more commonly på skolen depending on meaning
• hjem = home

If you say etter jobben, it sounds more definite or specific, like after the job or after work today / after finishing that work, depending on context. In this sentence, etter jobb is the most natural general expression.

Here så means so or therefore.

It connects two main clauses:

• Jeg er sliten etter jobb
• så jeg tar på meg pyjamas og tøfler med en gang

Because this så is a coordinating conjunction, the next clause keeps normal main-clause word order:

• så jeg tar ...

That is different from så meaning then, which often gives:

• Så tar jeg på meg pyjamas. = Then I put on pajamas.

So in your sentence, så means so, not then.

Because ta på seg is a fixed Norwegian expression meaning to put on clothing.

Its pieces are:

• ta = take
• på = on
• seg = oneself

But together, ta på seg means put on.

With jeg, the reflexive pronoun changes from seg to meg:

• å ta på seg = to put on
• jeg tar på meg = I put on
• han tar på seg = he puts on

This is one of those expressions you should learn as a whole phrase.

Because the reflexive pronoun changes with the subject.

In the dictionary form, you often see ta på seg, because seg is the general third-person reflexive form. But in an actual sentence, it changes:

• jeg tar på meg
• du tar på deg
• han/hun tar på seg
• vi tar på oss
• dere tar på dere
• de tar på seg

So since the sentence starts with jeg, the correct form is meg.

Because in this expression, the reflexive pronoun is part of the verb phrase ta på seg.

So the structure is:

• jeg
• tar på meg
• pyjamas og tøfler

The meg belongs with tar på, not with the clothing words. That is just how this construction works in Norwegian.

Because with clothing, Norwegian often leaves out the article after verbs like ta på seg and ha på seg, especially when speaking generally.

So these are all natural:

• ta på seg jakke
• ta på seg sko
• ta på seg pyjamas
• ta på seg tøfler

This feels a bit like talking about the type of clothing rather than highlighting one specific item.

If you want to refer to specific items, you can make them definite:

• jeg tar på meg pyjamasen og tøflene = I put on the pajamas and the slippers

So article omission here is normal and natural.

In Norwegian, pyjamas is usually treated as a singular noun referring to one set of pajamas.

So you can have forms like:

• en pyjamas
• pyjamasen

That is different from English, where pajamas looks plural. In this sentence, there is no article, so you just see the basic noun:

• tar på meg pyjamas

Because slippers normally come as a pair, so the plural is very natural.

• en tøffel = one slipper
• tøfler = slippers

So pyjamas og tøfler means pajamas and slippers.

Med en gang is a fixed expression meaning:

• right away
• immediately
• at once

It is best learned as a whole phrase, not translated word by word.

Some similar expressions are:

• straks = immediately
• med det samme = right away

In your sentence, med en gang emphasizes that the speaker changes clothes as soon as possible after work.

Not necessarily.

Norwegian often uses the present tense where English might use:

• the simple present
• the present continuous
• or even a near-future idea

So jeg tar på meg pyjamas og tøfler med en gang can mean something like:

• I put on pajamas and slippers right away
• I’m putting on pajamas and slippers right away
• I’ll put on pajamas and slippers right away

The exact feel depends on context.

If you say jeg skal ta på meg ..., that sounds more explicitly like I’m going to put on ... But the simple present is very common and natural here.