"Übungsbuch" is the German word for "exercise book".
Übungsheft
You would say "an exercise book." This is because "exercise" begins with a vowel sound, so you use "an" before it to make it easier to say.
Books is die Bücher in German.
tusi; exercise book - api
To say "open your exercise book" in French, you would say "Ouvre ton cahier d'exercices."
Notizbuch Heft
Ejercer is the Spanish infinitive verb, meaning to exercise. ejercicio is the relevant noun: 'exercise'
aufgeschlagenes Buch-Quiz
Exercise book is: manual de ejercicio.
book is livre exercise is exercise so it's un livre d'exercises
exercise book mean exercice du livre
The German word for "book" is "Buch"