Réponses

2014-01-18T00:12:29+01:00
Simplifie puis calcule les produits :

A = 45/14 x 49/60
A = 2205/840
A = 105 x 21 / 105 x 8
A = 21/8

B = 5/3 x 4/5
B = 20/15
B = 5 x 4 / 5 x 3
B = 4/3

C = 45/26 x 65/72
C = 2925/1872
C = 117 x 25 / 117 x 16
C = 25/16

D = 2 x 9/6
D = 18/6
D = 6 x 3 / 6 x 1
D = 3/1

E = 7/6 x 6/7
E = 42/42
E = 1 x 42 / 1 x 42
E = 1/1
E = 1

F = 12,4/6 x 8

F = 12,4/48
F = 3,1 x 4 / 12 x 4
F = 3,1/4

G = 2,5 x 3/0,5
G = 7,5/0,5
G = 15

H = 5,6 x 9/0,7
H = 50,4/0,7
H = 72

I = 0,55 x 2/11
I = 1,1/11