Réponse:
a) 28-3*7=28-21=7
b)5*(7+2)=5*9=45
c)(17+7)/2=34/2=17
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Réponse:
a) 28-3*7=28-21=7
b)5*(7+2)=5*9=45
c)(17+7)/2=34/2=17