Learn Dutch: Mits wij de klus kalmpjes afhandelen, zal zij niets merken. - Provided that we handle the chore calmly, she won't notice anything.

Adding -pjes to the adjective kalm turns it into an adverbial diminutive. While kalm means calm, kalmpjes specifically describes doing an action in a relaxed, quiet, or unhurried manner. This suffix softens the tone, making the action feel less forceful and more colloquial.

Is mits just a formal way of saying als (if)?

They are similar and both push the verb to the end of the clause, but mits is stronger. It specifically means provided that or on the condition that. It emphasizes that her not noticing is strictly dependent on the chore being handled calmly, whereas als is just a general if.

Why is the second half of the sentence zal zij instead of zij zal?

The sentence begins with a subordinate clause (Mits wij de klus kalmpjes afhandelen). Because this entire clause occupies the first position of the overall sentence, the main clause that follows must immediately start with its verb to satisfy the Dutch verb-second rule. This causes the subject and verb to invert to zal zij.

Why is the separable verb afhandelen written as a single word here?