Réponse :
Explications étape par étape
Bonjour
A = 3/4 x 28
A = 21
B = 20/100 x 90
B = 18
C = 21/2 + 46/4
C = 42/4 + 46/4
C = 88/4
C = 22
D = 3 x (18 - 8/4 - 8)
D = 3 x (18 - 2 - 8)
D = 3 x (18 - 10)
D = 3 x 8
D = 24
E = (16 + 18)/2
E = 34/2
E = 17
C’est le lutin en chef
F = 7 + 9
F = 16
G = (2 + 2 + 2) x 3
G = 6 x 3
G = 18
H = 144 - 81 - 49
H = 144 - 130
H = 14
I = -(-8 - 5)
I = - (-13)
I = 13
J = (16 + 14)/2
J = 30/2
J = 15
Chocolats de noël
Triangle rectangle :
AB^2 = 10,9^2 - 9,1^2
AB^2 = 118,81 - 82,81
AB^2 = 36
AB = 6 cm
EL^2 = 9^2 + 12^2
EL^2 = 81 + 144
EL^2 = 225
EL = 15 cm
Aire :
A = 35 x 12 / 2
A = 210 cm^2
12 x 6 = 72 cm^2
6 x 20 = 120
4 x 63/2 = 126
La fabrique à jouet
