After a long vowel, a diphthong, or an unstressed -el/-en/-er ending, add -tje.
Every Dutch diminutive is a het-word and forms its plural with -s (nummertjes).
The diminutive (verkleinwoord) of nummer is "het nummertje". After a long vowel, a diphthong, or an unstressed -el/-en/-er ending, add -tje.
Het. Every Dutch diminutive is a het-word, so it is het nummertje even though nummer takes het.
Diminutives always add -s, so the plural is nummertjes.
The platform drills the grammar that makes your Dutch natural, in real A2 exam tasks, AI-graded across all five DUO sections.