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Mathematics, 24.09.2019 14:50 TPfishing16

Bonjour , je n'arrive pas a faire ces calcules quelqu'un pourrais m'aidez voici les calculs : 1 sur 4 - 3 sur 4 et calculer un pourcentage 30%de 150€
30 sur 100 x 150 = 30x50 sur 100 = 3x10x15x10 sur 10x10 =45
calculer 90% de 2300 touristes
calculer 112% de 80km/h
merci

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Bonjour , je n'arrive pas a faire ces calcules quelqu'un pourrais m'aidez voici les calculs : 1 sur...
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