Niveau 5 ème Exercice 1 :
Développe et réduis les expressions suivantes.
A = 2 ×(x+5) B =3,5 × (12 - y) C = (5-3t) × 11
= = =
= = =

D = 3,2(b + 10)-2×(7c-5)
=
=
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