Chapitre 1

Puissances de nombres entiers

Activité 4 – Priorité des opérations

a) Calcule en respectant les règles de priorité.
7 . 2 – 5 =
4 . (5 – 7) =
3 – 5 . 3 =
– 5 . (– 2 – 7) =
– 8 + 2 . (– 7) =
(– 7 + 5) . (– 2 + 9) =
– 1 – 3 . (– 4) =
(– 5 + 2)2 =
7 – (– 2) . (– 7) =
(3 – 5)3 =

4 + 5 . (– 3)2 =
–2 + 3 . (– 2)3 =
5 . (– 2)4 – 2 . (– 3)3 =
3 . (– 5)2 – (– 4)2 . 3 =
(– 3 + 5) . (– 2)3 =
3 . (2 – 5)3 =
(2 – 8)2 . (– 6 + 7)2 =
(– 5 + 3) . (– 6 + 2)3 =
5 – 3 . (6 – 2)3 =
5 . (– 3) – 6 . 23 =
b)

Calcule la valeur numérique des expressions suivantes sachant que :

a = – 1
b = – 2
c = 4
d = – 3
5b3 =
..........
– 4a5 =
..........
7d2 =
..........
2d3 =
..........
– 5c3 =
..........
– 10b4 =
..........
– 2c2 =
..........
10b5 =
..........
 
       
5a3 – 7b2 =
..........
     
6b2 – 4a5 =
..........
     
3d2 + 5b3 =
..........
     
a7 – 4b3 =
..........
     
3c2 + 3a3 =
..........
     
b2 – 3b + 7 =
..........
     
 
       
2b3 – 5b2 + b – 1 =
..........
     
– 2d2 + 5d + 1 =
..........
     
a3 – 5a2 + 2a – 5 =
..........
     

Vos remarques sont les bienvenues.