1.3 rich ülkü7 https://learningapps.org/userapps.php?user=8407135 LearningApps.org https://learningapps.org/ 950 500 https://learningapps.org/appicons/2/21662480.png?large 300 200 <iframe src="https://LearningApps.org/watch?id=piw1jspea21" frameborder="0" width="950" height="500" allowfullscreen></iframe>