Ex 1 :

* =multiplier

H = 3*5 + 2

H = 15 + 2

H = 17

I = 8 + 4*7

I = 8 + 28

I = 36

N = 10* (10+5)

N = 10* 15

N = 150

Ex 2 :

* = multiplier

Cm2 = centimètres au carré

1) a. P = 2*(5+x)+(2*3)

b. P = 2*(5+4)+(2*3)

P = 2*9 + 6

P = 18 + 6

P = 24 cm

2) a. A = Longueur * largeur

A = (5+x)*3

b. A = (5+2)*3

A = 7*3

A = 21 cm2