Exercice n°4:
Calculer après avoir transformé les soustractions en additions.
• (-4)-(+5) =
• (+8) -(-3) =
• (-54)-(+54) =
• (-7) - (-11) =
• (+4)-(-2) =
• (-3) - (+3) =
• (+14) - (+11) =
. (+8)-(-8) =