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Unit Conversion with Fractions http://www.khanacademy.org/video/unit-conversion-with-fractions ----------------------------- يتناول هذا الفيديو مسألة توضح تحويل الوحدات بالكسور ------------------------------- شكر خاص لمؤسسة شركاء في التنمية المستدامة -- فلسطين http://psdpal.org