Bonjour je suis en 4ème et je voudrai savoir si mes calculs sont bons pour les 2questions svp: 1/ 42*30+79*40+48*50+21*60+13*70=8990/203=44,28Km/h

2/
13+21+48+79+42=203
13+21+48=82/203=40,39%

Pouvez vous me dire si c’est bien cela svp?
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