Exercice 4
Sylvie a multiplié la somme de (-9) et de 4 par (-5).
1 Choisissez parmi les expressions suivantes celles qui correspondent à son
calcul.
a –9 + 4 x (-5)
b (-9 + 4) x (-5)
c (4 – 9) x (-5)
2 Calculez la somme du produit de (-3) par (-5) et de (-8).
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