يريد بعض الطلاب شراء أقلام رصاص من متجر مواد مكتبية. ثمن قلم رصاص واحد هو 20 سنتاً. يريد تولو 3 أقلام رصاص، ويريد روبرت 5 أقلام رصاص، وتريد ميليسا 2 قلم رصاص. كم المبلغ الذي سيستخدمه الطلاب في متجر مواد مكتبية مجتمعين؟
الثلاثة طلاب يريدون جميعًا 3+2+5 = 10 أقلامًا
كل قلم يكلف 20 سنتًا ،故"/>
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