Activité 4 – Sommes et produits
a) Calcule (attention, les opérations sont mélangées).

– 5 – 3 =
– 2 + 7 =
– 4 . 2 =
15 – 2 =
(– 5) . (– 3) =
– 2 . (– 7) =
(– 4) + 2 =
15 . (– 2) =
+ 5 – 3 =
– 2 – 7 =
(– 4) . (– 2) =
– 15 – 2 =
(+ 5) . (–3) =
– 7 . (– 2) =
– 4 – 2 =
–15 . (– 2) =
3 – 5 =
– 2 . 7 =
2 – 4 =
– 2 + 15 =