53 Recopier et compléter par le chiffre et/ou le signe manquant.
a) (-15) x (... 4) = -60
b) (-2) x (-1) x (... 2) = (...)
c) 3x (...) (...) = ... 27
d) (-4)x(...) (-1) =-4
Pouvez-vous m’aider à faire cet exercice
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