Activité 5 – Propriétés de l'addition
a)
Calcule.
(+ 5) + (– 2) + (– 7) =
7 + (– 5) + 10 + (– 3) =
(– 2) + (– 9) + (+ 6) =
– 3 + 5 + 12 + (– 1) =
(– 5) + (+ 6) + (+ 4) =
5 + (– 6) + (– 5) + (– 1) =
5 + (– 2) + (– 3) + 7 =
– 4 + (– 6) + 4 + (– 1) =
– 2 + 5 + (– 3) + 7 =
– 5 + (– 6) + 6 + (– 5) + 4 =