This is the 13790th most frequent German word.
ergänzten
"Ergänzten" is the past tense of "ergänzen," meaning "completed" or "supplemented."
Here 'ergänzten' means the students added or provided the necessary remaining parts to finalize their assignments.
Die Schüler ergänzten ihre Hausaufgaben pünktlich.
The students completed their assignments on time.
In this usage 'ergänzten' conveys providing supplementary parts that enhance or complete the original document.
Die Ergänzungen, die sie machten, ergänzten das ursprüngliche Dokument perfekt.
The additions they made complemented the original document perfectly.
In this case, 'ergänzten' refers to enriching the presentation with additional details.