The exercise itself is in German; the explanation pages it links to are in Turkish.
Uhrzeit (telling the time)
In German you can tell the time in two ways. Officially: number + Uhr (drei Uhr = 3:00). In everyday speech you use Viertel nach (quarter past), Viertel vor (quarter to) and halb. Careful: halb vier = 3:30 (half an hour before four), not 4:30. You will work out the correct phrases yourself in the exercise. All exercise content is in German.
Recognise: match the time with the way it is said in everyday speech. halb = half an hour before the next hour.
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What is in the "Uhrzeit" exercise?
The "Uhrzeit" exercise has 5 steps with 50 questions in total: 10 matching items, 30 multiple-choice questions and 10 gap-fill items.
The steps in order: Match · Wie spät? · offiziell · Richtig/Falsch · Write.
You get instant feedback after every answer; the exercise runs in your browser, is free and needs no sign-up or installation.
Where can I study "Uhrzeit"?
The explanation for this exercise is on the page Uhrzeiten – Telling the Time in German (Explanation) (in Turkish). Read the rule there, then reinforce it with the 50 questions on this page.